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

Change-Id: Iaf9d69f73782a0f1399963be62408cf2232c0ee2