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

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

Change-Id: I5a2daf8a0c0a7ee6887ec66e6d7b44ac38ded884