Merge "Handle null buffer when calling Transaction::setBuffer" into tm-dev am: 297bc93384 am: b016cb444d am: fbaf6591e5 am: a55e69f20a

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

Change-Id: Ifd6d8da5c26abbbba85ff619c593908b05f04f30
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>