Revert "AppendData:MPEG4Writer&Extractor,MediaAppender"

Revert "Updating references for libmediandk"

Revert submission 13020888-PauseResume changes in Muxer and Extractor for Transcoding

Reason for revert: Broken test: com.android.server.wm.flicker.monitor.ScreenRecorderTest#videoCanBeSaved
Reverted Changes:
I109cec9b3:Updating references for libmediandk
I72ef683ec:AppendData:MPEG4Writer&Extractor,MediaAppender

Change-Id: I99a3a8aec1c9c6f524a58a99563c882dd73b2ce2