Parameterize MediaBitstreamsTest

Bug: 30268664
Test: cts-tradefed run everything \
  -m CtsMediaBitstreamsTestCases \
  -t MediaBitstreamsTest#testBitstreamsConformance[path/to/bitstream]
Change-Id: I44a8bf4c6cba93e5d68aa52791f321f402334cc9
6 files changed