etc: media_codecs: alter video encoder and decoder priority

720P codecs are always used irrespective of the codec capability
required for encode or decode. Reorder to use the 720P codecs only
when the generic encoder and decoder fails.

Change-Id: Ie98dad121a75817b8ef81990192a0e5c9a2055c8
Restore overlay for shutdown options

Change-Id: Ieeb4041429a484381dc8a10d08319b3c93ad4861