stagefright: Don't expose QTIFLAC definition unless enabled

Change-Id: Ia3173ddc6adeff37b77bfe6b73e62702a3f178dc
NuPlayer: use video hardware codec only

- if the client has the specific request,
  only use video hardware codec for nuplayer

Change-Id: Id6dd13b99d02ea4466f2014e0e4b3ff9b3f7e492
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0