frameworks/av : Playing AAC and MP3 clips using LPA.

-AAC and MP3 clips are not playing.
-AAC and MP3 are not using LPA path.
-Enable LPA decoder path and implement LPAPlayer class.

Change-Id: I76438319fc72c4898fad5910f8de874f89287687
Merge "frameworks/av : Playing AAC and MP3 clips using LPA." into jb4.2