[automerge] C2SurfaceSyncObj: prevent OOB read in Import 2p: e3958886db

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/20758528

Bug: 240140929
Change-Id: If19fba3d4d051ee5a1ca6f9b5229afcc782b9e49
Merged-In: I7b4cd8aa3fa5b9b2160f0eba40a618b4dd536d5c