mm-video-v4l2: vdec: Disable switching to surface-mode-format

In case Flexible YUV is supported,
Do not switch the color-format _after_ the client has negotiated
and set the color-format via VideoPortFormat.
MediaCodec apps can explicitly request a specific color-format in
non-surface mode rather than expect the decoder to provide a
standard YUV format.

Bug: 17906609
Change-Id: Ib5bda3063b1da46927389c9c6eb522824c238d5e
1 file changed