Check for buffer overflow in pps/slice header parsing

Bug: 36215950
Bug: 36215953
Bug: 36216719
Change-Id: Ibdc05e1d5aa21d060d7c683fd9af4bed8537053f
(cherry picked from commit d61d5e5f6aa0e5f80b8ae793aca4a4085d015c06)
2 files changed