GitLab

+ Swap out/in new assets for end/split icons in the manager screen,
and the splash screen in the InCall screen.
- Removed unused conference call manager code, including things like
chronometer and the "done" button.
+ Replaced custom action bar in conferece call manager with standard
action bar.
+ Added contact image (does not open quick contact) in the list of
calls in the conference call manager. This is done with a lookup
using the contact photo manager, and required adding the lookup key
to the ContactCacheEntry.
+ Handled a missing Call.State case in CallCardFragment for calls
with state CONFERENCED which caused crashes.
+ Misc style changes on conference call manager: colors, sizes,
paddings.
+ Adjusted elevations so dialpad covers manager/secondary buttons.
+ Added ripple to manager/secondary buttons.

Bug: 15862303
Change-Id: Iab9b6421d5a1ea69cd951a459d46c065f9456a8f