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: ef53953f am: ad68a6c8

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

Change-Id: I0e3e41b0605edafab784c380171fd6db52634e77