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This change will make it easier to have Android buffer queue as a sink in
the future.  For backwards source code compatibility with beta developers,
retain the old name temporarily.  As soon as they have switched to the
new name, we will remove the old name.

Details:
 - rename XA_IID_ANDROIDBUFFERQUEUE to XA_IID_ANDROIDBUFFERQUEUESOURCE
 - rename SL_IID_ANDROIDBUFFERQUEUE to SL_IID_ANDROIDBUFFERQUEUESOURCE
 - rename MPH_ANDROIDBUFFERQUEUE to MPH_ANDROIDBUFFERQUEUESOURCE
 - did not rename the data locators and interface struct,
   as they can be shared across both source and sink
 - did not rename the member field mAndroidBufferQueue in
   CAudioPlayer / CMediaPlayer as that would be a huge change;
   can do that later if necessary
 - the SINK definition will be added later when needed

Change-Id: I36dc01050efb99d4d7802b2ca2b870f4d978ee21