Merge "Handle null buffer when calling Transaction::setBuffer" into tm-dev am: 297bc93384 am: b016cb444d am: ec22e04a04

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

Change-Id: I831da8d5056e64c72fb272b3794fe25c931db8cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>