[automerger skipped] Merge "DO NOT MERGE ANYWHERE: Do nullptr check on source filter" am: ce765a74 -s ours

am skip reason: subject contains skip directive

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1712728

Change-Id: I75abdbc47e2deee13e78de61d4732ed07c1a0ecb