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

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



Change-Id: I2b125c6e92c68a5ee9048214f2a141a3d396ce46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>