GitLab

- Add isVideo method to the InCallUI call.
- Added cases and actions for isVideo to StatusBarNotifier.
- Added cases for isVideo for processing incoming call in the
full-screen experience in AnswerPresenter.
- Did what I figured would be some cleanup, to consolidate some
helper methods only ever called once, and reorder some methods
to be more alphabetical.
- Added new intent type for video calls (and revised old one for
audio calls), which are dispatched by the StatusBarNotifier and
received by the InCallApp.
- Update icons used, and deleted unused icons.

Bug: 16013878
Change-Id: If0a8d04e2ee6eaf8258ce6a677b22d55a584f9ab