Camera3: Change the PREVIEW_FORMAT to be the same as VIDEO_FORMAT

This improves the camera power usage by utilizing CPP output
duplication for the 1080p recording usecase.
Note: NV12_VENUS for preview is the same as NV12 for recording

Ack by tgodbole

Change-Id: Ie58acfc35d4dfb60f4e2dd1fbbcbe04cbe5c27cf
1 file changed