Support AAC audio (WaveFormat = 0xFF) in AVI container.

Present AVIExtractor doesn't support AAC audio. So some AVI clip with AAC,
AAC-HEv1, AAC-HEv2 audio, can't be played from gallery.
With this fix, added support for AAC audio (WaveFormat = 0xFF) in AVI container.
Also added a condition to check the sampling rates which are supported and return
error if unsupported sampling rate is encountered, to avoid tombstone crash.

Change-Id: Ic8f081ed254ce8c0b3c0cbd1c3811b89b18c6e8e
Signed-off-by: gbhakteX <gurudattax.bhakte@intel.com>
Signed-off-by: Mazhar <mazharx.sameullah@intel.com>