Merge "Handle null buffer when calling Transaction::setBuffer" into tm-dev am: 297bc93384 am: 0a047a06f2 am: 0f0680a2e3 am: c90311da4a

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

Change-Id: Ie4837be2b05e2796b908d779bed65045d55e68da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>