mm-video: vidc: vdec: advertise color formats based on usage hint

Clients on Android hint usage of output buffers for:
[a] local playback or [b] access decoded YUVs for software filtering,
by setting an extension OMX.google.android.index.useAndroidNativeBuffer2.

For playback, it is preferable to publish native/accelerated formats,
while apps prefer known YUV formats

Change-Id: I37a5fbc38568dd783f42b67d6cf20d9e6f3d0eba
CRs-Fixed: 620886