Merge "Handle null buffer when calling Transaction::setBuffer" into tm-dev am: 297bc933 am: 0a047a06

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18501030



Change-Id: If2800c62e212b351b3f7bcc701a89601d175ddb2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>