Merge changes If140d716,I89a186fa,Iee4e5c09,I5df97f0c,I55f75dc3, ...

* changes:
  Don't start emergency call in background calling mode.
  Make call configuration package visibility public.
  Don't save transcript if it's empty.
  Cancel all legacy voicemail notification when SIMs are removed on multi-SIM devices
  Fix bug that transcript button is visible for voice call.
  Refactor PreferredAccountWorker to provide the dialog to be shown.
  Fix bug that displaying local message is not in sync.
  Don't show dialog if in call activity is not visible.
  Bubble changes for background calling.
  Store RTT transcript message received when UI is in background.
  Update RTT transcript advisory text.
  Implement "Add to favorites" option in suggestions menu.