Merge "Add new callback for when activity rotates" into rvc-dev am: 38dbc979...

Merge "Add new callback for when activity rotates" into rvc-dev am: 38dbc979 am: 741f3043 am: a0e29bd5 am: 1607ab0c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11396809

Change-Id: I0bcbb518096931bc163739f1533de2b70f1f33d0