Expose MediaExtractor entry point to MediaMetrics

Bug: 170386720
Test: atest CtsMediaV2TestCases:ExtractorTest$FunctionalityTest
Change-Id: Id10861db464b88734c34c81db945b1a828f0bc2c
Merged-In: Id10861db464b88734c34c81db945b1a828f0bc2c
1 file changed