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A2DP now supports adjusting the number of A2DP frames sent per timer
tick to adjust for timer drift and missed media task ticks. When the
signal to the headset/speakers becomes interrupted, the number of
packets to be read can queue up and rate limiting will not allow for the
queue to be cleared.

The overflow mechanism introduced in commit 4aebca46 will cause the media
task to stop sending packets completely, which can underflow the jutter
buffer on the remote device and lead to audio drop-outs.

This patch removes the overflow mechanism and also adds code do discard
audio frames that could not be sent to the remote device (weak signal
etc) to allow the device to stay in sync and not build up audio delays.

Also added additional debug logging and changed the UIPC flush mechanism
to address an issue where reading byte by byte causes an endless flush
loop if remote UIPC producer writes data faster than the flush loop
consumes it.

Bug: 18244205
Change-Id: I9a424984806bb2a464877399804b3355b2c439c3
(cherry picked from commit c5916e97)

Bug:17703806
Change-Id: I103d3637ad38d33b4370850a300b0d72bdaeb562

* commit 'f37767a1':
  HOGP: Do not remove device from whitelist on encryption failure

If the encryption times out during the re-connect process for a HOGP
device, the device is removed from the whitelist and thus will not
reconnect until it is added back to the list. On platforms that do not
have a way to reconnect to a device manually, this means the device will
never reconnect again until the stack is restarted.

This patch checks the reason for the encryption failure and does not
remove the device from the whitelist if the encryption failed to a non
authentication/key related error.

Bug: 18233442
Change-Id: Ifaec4a9224ff9281956715b38d34c2d7c3fecb01

am e50c7933: DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2 automerge: 595bcb4c  -s ours automerge: 23699356  -s ours

* commit 'e50c7933':

am 87303c76: Increment seq before adding to packet in avdt_scb_hdl_write_req_no_frag automerge: 98ad505f automerge: f81ffdb1

* commit '87303c76':

DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2 automerge: 595bcb4c  -s ours
automerge: 23699356  -s ours

* commit '23699356':

automerge: f81ffdb1

* commit 'f81ffdb1':

am 5fe98634: am ba2f6d99: Revert "anthias:17614185:Bluetooth: Getbuf returning invalid buffer pointer" automerge: 8403c6d2

* commit '5fe98634':

automerge: 8403c6d2

* commit '8403c6d2':

am 27c93b25: am 46bfe63d: DO NOT MERGE AVRCP: Proper handling of Fragmented AVCTP packet automerge: f9336d34  -s ours

* commit '27c93b25':

am 36ba410e: am c1ccb0d9: anthias:17614185:Bluetooth: Getbuf returning invalid buffer pointer automerge: 0e74efe5

* commit '36ba410e':

automerge: f9336d34  -s ours

* commit 'f9336d34':

automerge: 0e74efe5

* commit '0e74efe5':

* commit '472c2a7b':
  Don't starve a BT ACL link with 0 xmit quota

automerge: 595bcb4c  -s ours

* commit '595bcb4c':
  DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2

automerge: 98ad505f

* commit '98ad505f':
  Increment seq before adding to packet in avdt_scb_hdl_write_req_no_frag

With new link management of controller buffers between
different ACL connections, it is possible that a ACL
conn would get 0 buffers - thus no profile can run.
This affects classic and LE ACL connections.

This work around allows a floor of 1 buffer as the
floor for all connection, irrespective of controller
capability.

Bug: 17976311
Change-Id: I7cd0d34af47c441c5ea7f2b836b591a4fec62ad1

* commit '5e808468':
  LE: Do not remove bond on encryption failure

If the encryption fails during the re-connection process with a
previously paired LE device, the pairing is removed. Thus, a single
connection failure could lead to the device be unpaired.

This patch prevents unpairing when encryption fails.

Additionally, the IRK is restored from NV ram to fix reconnection to
dual-mode devices.

Bug: 18072300
Change-Id: I077a16d0715fdaa07b95b1c664c18bd839754896

* commit '433fe016':
  Cache HOGP HID report map

* commit '25249f76':
  Retry pairing if the device did not respond (page timeout)

* commit '01d102b3':
  A2DP: Lowering maximum PCM frame limit to avoid audio breaks

HID reports from a bonded device can be missed when Bluetooth is
restarted HOGP report discovery is still active. Caching the
report information and loading it back when the stack resets
will ensure incoming HID reports can be processed immediately.

Bug: 17999991
Change-Id: I4608935f8749537d6b05625b894445a21f844ee0

Bug:17574681
Change-Id: Ia33d0a845d5a4ac5aa58bd32529aeae60db4fd49

Some car kits (notably Renesas car kits used in Nissan/Infiniti models)
will throttle incoming A2DP frames if too many frames are sent at once.
This patch lowers the maximum number of frames sent per tick to not
overwhelm the remote device.

Bug: 17880920
Change-Id: I7bfbba625405c96159d1c94eebd8dc498f100daa

Implements a "blacklist" identifying troublesome remote devices which
may require multiple pairing attempts to succeed.

Change-Id: I11b6b7da7230e37fbd5ec4c07cd38b30dc12b40e

* commit '9d8df2d1':
  LE: Serialize multiple connection parameter update requests

* commit 'd8586177':
  Implement GATT service cache

When trying to reconnect a previously paired device, notifications may
be sent by the remote device before the characteristic handles have been
discovered. Thus notifications will be lost.

This patch adds a non-volatile attribute cache that allows attribute
handles to be restored before notifications are received.

Bug: 17999991
Change-Id: I97faefbc6a2fed86cbce7f64d620ed03944d89b2

am f777d24c: am 595bcb4c: (-s ours) DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2

* commit 'f777d24c':
  DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2

* commit '4a35476c':
  Increment seq before adding to packet in avdt_scb_hdl_write_req_no_frag

* commit '595bcb4c':
  DO NOT MERGE Do not set sig_id in gerneral reject message per AVDTP SPEC 1.2

AVDTP SPEC 1.3 set sig_id in gerneral reject message. But current stack
is on AVDTP 1.2, we need set the field to be 0.
Setting sig_id would fail PTS test TP/SIG/SMG/BI-28-C

Bug: 17892440
Change-Id: I2037aae299eab15864fc7b53ada7f49c0f34b9c5

* commit '98ad505f':
  Increment seq before adding to packet in avdt_scb_hdl_write_req_no_frag

Bluetooth controllers do not allow multiple connection parameter
updates where there is one outstanding. This requires serializing
all connection parameter update requests and send the latest
request when the pending one is finished.

Bug: 17979666
Change-Id: Ic49bd89a4ded28014d74b40e67f2a3ea490b9ef7

Bluetooth Certification Test case TP/TRA/BTR/BV-01-C for Basic
Transport Service Support fails. The failure is because the PTS
is expecting the first RTP Media Frame to have a sequence number
of 1. But metallica sends it as 0.
bug 17893538

Change-Id: Idfe7ae382c3764616dab4733cdf83b1627b8b3c9