tree babb150a4d0046bd60fce0645e4096b72e1f88f6
parent d1add22b10d11a4341e2659ad71e6aeddedb0073
author Albert Chaulk <achaulk@google.com> 1488471967 -0500
committer Albert Chaulk <achaulk@google.com> 1488477625 -0500

vrwm: Add a listener for enter/exit vr mode events

This uses the same system service SurfaceFlinger does

Bug: 35917583
Test: Launch VR app, press home button, lock screen. Check vrwm
  recieves event

Change-Id: I923c24b9d495a4bfbfb3512cfb52760d6947fdbf