c2 av1, vp9: Add support for P010 format

Updated VP9 and AV1 decoder plugins to support P010 output.
Plugins now advertise P010 as supported color format and return
P010 output for 10 bit clips.

Bug: 178229371
Test: atest CtsMediaDecoderTestCases:ImageReaderDecoderTest -- \
 --module-arg \
 CtsMediaDecoderTestCases:instrumentation-arg:codec-prefix:=c2.android.
Test: atest android.mediav2.cts.CodecDecoderSurfaceTest \
 android.mediav2.cts.AdaptivePlaybackTest \
 android.mediav2.cts.CodecDecoderTest -- --module-arg \
 CtsMediaV2TestCases:instrumentation-arg:codec-prefix:=c2.android.

Change-Id: I4c2ad2f45d51337b44de4a5a5a44281c4a7640ad