Revert "display: Video Encoding not working"

* CAF messed up big time on this piece of code
* looks like they mismerged de13ed01a21db7d6b46962729fa3f9ff3ef8c2cd and accidentally backported bad code to 2.7
* this code was even reverted in 3.5 so there's literally no reason to keep it

Original Message:
This reverts commit 0a1db6aef28c3b90d1f992f56abc562dbae10b55.
Video encoder uses the NV12 encodeable format again.

Change-Id: I1b5170a5c2b5c7de0791cc5bc44457257519f749