stagefright: Remove dead code

Change-Id: Ic543dfc5f1278dda1073e607fa9bdb381555256b
stagefright: enable traces for performance debugging

Trace number of video output buffers with OMXCodec, EBD,
FBD messages. Trace calculated sleep-delay in AwesomePlayer
and trace AudioPlayer::fillBuffer call.

Change-Id: Ib63fa4da48e690c79d57e134a6ad4519e396d198