Merge "DO NOT MERGE: Apply input buffer validation also to AVC and MPEG4 encoders" into lmp-mr1-dev am: fb41e97c01  -s ours am: df8c8eccea  -s ours am: 03e101cfda  -s ours am: 280f41971a  -s ours am: 8d78f41079  -s ours am: f394af84d6  -s ours am: 45ee853b29  -s ours am: ac1c3a1349  -s ours am: 1c38f4d0f4  -s ours
am: 289a80ec4f  -s ours

Change-Id: I5d502db04a61bf3f5f756ff7cdc84310d97998c8