Should create a decoder from MediaCodecList

The testHEVCDecode30fps1920x1080 would fail on a particular chipset
due to its resolution. MediaUtils.canDecode() checks the
decodability by using the specified media format. On the otherhand,
the decoder is created by DecoderTest.decodeWithChecks() which
handles the mime type extracted from the format. The failure is
caused by the difference of these methods. To resolve this issue,
the both methods should decide from the same source.

Change-Id: I9722d51573e6b98f0c21921e4e667a4eed4cbcf3
2 files changed