mm-video-v4l2: vdec: update color format after native-window setup

Clients on Android indicate surface-mode with custom extension
"OMX.google.android.index.useAndroidNativeBuffer".
Set format internally to native-format in port-def so that this
color format is returned to client for playback.
In absence of the custom parameter set, we will return a
standard YUV format

Change-Id: I085cbb7558228a77e84d34ce1a6862c76ed97f4d
2 files changed