Decoder: Increased allocation and added checks in sei parsing. am: f2b70d35 am: 8d32a711 am: a0827a3b am: cd831159 am: 2a3efcfc am: 013d98b7 am: 48d8b5bb Change-Id: Ibb63c70e60f910188358935509f50e1c9a37b4b6