Refactor Voicemail Playback into standalone view.

+ Substitutes the existing playback widget in CallDetailActivity,
although the plan is to move this to the call log shortly.
+ Convert the widget from a fragment into a layout. This allows us
to more easily create multiple instances of the voicemail widget in
the same view, as we intend to do in the call log.
+ Shift UI-related logic from Presenter to the Layout.
+ Fix janky seeking, so that it now works correctly consistently
rather than sporadically, and doesn't need to buffer again.
- Remove the VariableSpeed player formerly used in the Presenter. We
don't use this functionality anymore, and this allows us to directly
used the framework MediaPlayer (instead of a custom legacy proxy).

Bug: 21170557
Bug: 20693172
Change-Id: Ia34f459df10e43763b32fdb0954f83e882664231
8 files changed
tree: fcbfef6b072f8442432e39f1995ae18f2f34332e
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags