CCodec: reflect output format change after configure.

In
https://developer.android.com/reference/android/media/MediaCodec#getOutputFormat()
public MediaFormat getOutputFormat ()
You can also call this after configure(MediaFormat, Surface, MediaCrypto, int)
returns successfully to get the output format initially configured for the codec.

It means output format should be updated to reflect the parameters set
to codec in configure.

bug: 181137009
Change-Id: Ic27e008ac4dd6851659f1a9e8a9921026d454f6b