Allow saving of presenter state during activity recreation

Also correctly save state of CallButtonPresenter so that
mute/unmute logic persists across activity destruction.

Bug: 18270222
Change-Id: I56abd69aa04bfc63f2ffab0f35d551f03df75867
4 files changed
tree: 44846d70b2b91962fbdb3e6359bce43564a2caf9
  1. InCallUI/