Don't start ringback until CallService ACK

Only start playing the ringback tone once a CallService has
acknowledged that it can be handling the call.

Bug: 13902624

Change-Id: I702dff71e4042ae87dd9aa2c46d53e9bdd66f321
2 files changed
tree: 7f04806ce0d528e36ec9ea0aac7273876c1c0a5a
  1. libs/
  2. res/
  3. src/
  4. tests/
  5. .classpath
  6. .project
  7. Android.mk
  8. AndroidManifest.xml