am 5996246f: Merge "Revert "Allow back to be pressed while in incoming call screen"" into lmp-mr1-dev

* commit '5996246fba6af965781f21938e2954c32024e654':
  Revert "Allow back to be pressed while in incoming call screen"
tree: 6cc55108910f9b67c0443225e82b9aaa5251e148
  1. InCallUI/