media: Update MediaMuxer Java doc to reflect new features.

Generated a table to summarizes the feature support in different API version
and containers. Features include: Muxing B-frame, 3GP container, multiple
video/audio tracks, metadata tracks.

Test: None as just documentation.
Bug: 28536560
Change-Id: I7ab883a46f4b3420542eae504a33d4ebe1176a65