Merge "Revert "Revert "Restore support for source hint rect""" into rvc-dev...

Merge "Revert "Revert "Restore support for source hint rect""" into rvc-dev am: e5e4c105 am: 4ea00b38 am: de611844 am: 55af3e43

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11819193

Change-Id: I26bf03078a632112af4e9450cf147f2e22c40509