Merge "DO NOT MERGE: Apply input buffer validation also to AVC and MPEG4...

Merge "DO NOT MERGE: Apply input buffer validation also to AVC and MPEG4 encoders" into lmp-mr1-dev am: fb41e97c  -s ours am: df8c8ecc  -s ours am: 03e101cf  -s ours am: 280f4197  -s ours am: 8d78f410  -s ours am: f394af84  -s ours am: 45ee853b  -s ours am: ac1c3a13  -s ours
am: 1c38f4d0  -s ours

Change-Id: I92495fc4f6a9a0adccc5edb42d847262cf198bb4