FLAC coded file does not play (single metadata block files)

FLAC files which has the last metadata block flag set in
STREAMINFO were not playing. Sniff of FLAC is modified to
accomodate this set flag.

Change-Id: I76f216cc2cde6e10958324afbc704fc3e5a0e2bf
Author: Gurudatta Bhakte <gurudattax.bhakte@intel.com>
Signed-off-by: Gurudatta Bhakte <gurudattax.bhakte@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 32421
Revert "stagefright: Cleanup ifdefs in pause code"

Breaks audio pause-resume on non-QCOM device. The code here goes
with QCOM-specific mPaused code in OMXCodec.cpp.

Also added one more ifdef to fix compile error.

This reverts commit f771dc65603c8d06865f08a1b88be60cb53e19dd.

Change-Id: I1ebf3d15cfb7bf5c92745e0ab88cffd7adf192a0