Preemptively update In-Call UI upon hangup

Updates the In-Call UI right away after hangup, to give the user
immediate feedback despite any disconnect delays that may exist in
the underlying layers.

Bug: 17480900
Change-Id: Iccd6a3d5bae9159284883df116822670557080f7
2 files changed
tree: afef8f49bb2ad309be549fcaf6ba0b7ccefed28a
  1. InCallUI/