Merge "SF: Set dirty region bit if transparent region hint changes" into sc-dev am: 5b20104681 am: 616fd70411

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15240432

Change-Id: Ib051e63f0ca87a1f096f9ef205dd2aee84e6ef1c