stagefright-plugin: Allow playback video with negative timestamp
stagefright-plugin: Allow playback video with negative timestamp

Try to skip negative timestamp packets up to
a certain limit before we report video is MALFORMED.
This allows some video starts with a few video packets containing
timestamp before the reported video started time
to be played correctly.

CYNGNOS-2120

Change-Id: Id91aae916eb7e1071534c1948109e1bdbe2af26d

BrokenROM/external_stagefright-plugins,BrokenROM/external_stagefright-plugins