Decoder: Increased allocation and added checks in sei parsing. am: f2b70d35 am: 8d32a711 am: a0827a3b am: cd831159 am: 2a3efcfc am: 013d98b7 am: 48d8b5bb am: ccc5298f am: a1f8cef8 am: b864fbc7 am: 94a33985 Change-Id: I1dd5bd61e0b3e4395f2a85b864fa19ae27139305