Improve speakerphone setting.

+ Persist speakerphone setting across resume/pause.
+ Allow toggling speakerphone before voicemail is played or while
loading.

Bug: 23566924
Bug: 23716100
Change-Id: Icc7342be85bd6df0f4678134b222f2200d3fc56d
4 files changed
tree: 0a4e10108527ff170fc9cd9c311ea88e6110274d
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. proguard.flags