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 am: 289a80ec  -s ours am: 97eb375c  -s ours am: e4f5e4f9  -s ours am: 094cdb13  -s ours
am: 88bbec25  -s ours

Change-Id: I522c3d237efd35d6e553218115209d5bf1ed4cda