Merge "aidlpersistentsurface: enable submitting a null buffer" into main am: 6f9bf138

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3108199



Change-Id: I3cc906917bd883fbbd2a7bbb699a8a8ab3c32fbd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>