Remove direct dependency on libbinder from extractor impls

This change removes dependency on IMediaExtractor/Source binder
interfaces from MediaExtractor implementations. Wrapper classes,
RemoteXXX and CallbackXXX, have been added to convert the
implementations to binder objects or the other way around.

Test: build, boot, and play mp4 video file
Bug: 65851881
Change-Id: I351fb7bbaf8e0154295ccf258f85b8b2f2a4b8fb