[media] Implement MediaCodecVideoDecoder::GetSupportedConfigs().

The implementation is a direct translation of
AndroidVideoDecoderAccelerator::GetCapabilities().

Bug: 522298
Change-Id: Ife3d3a5b902bae7b891abad051f27ed934d9f42f
Reviewed-on: https://chromium-review.googlesource.com/c/1432713
Commit-Queue: Dan Sanders <sandersd@chromium.org>
Reviewed-by: Frank Liberato <liberato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#625928}
3 files changed