d2-common:  Lower max dimensions in media_profiles

1920x1080 encoding is currently causing issues for camcorder.
Lower it down to 1280x1024 for now till we can isolate the core cause
(should fix issues with camcorder as well as instagram and other 3rd party
cameras)

Change-Id: Id2059bc86bfb1b31ab1b7f07015a02f6c9ef6c2e