libstagefright: support 96kHz bitrate for FLACs

Previously, we would get this:

    E/FLACExtractor(  211): unsupported sample rate 96000

This commit lets us play these files now.

Change-Id: I01c14e95f6f21d33e12f30e8773b8c11c8b2ffe7
libstagefright: support for disabling buffer metadata

- Metada mode video recording is enabled by default.
- use setprop debug.camcorder.disablemeta 1 to disable metadata mode recording.

Change-Id: I422c49c0ace0c3a3e1f4459c7e4bf29e70af763a
Fix build error from commit 3da446303432e640c4c8240bbb2404f7c5dad97d

frameworks/av/media/libmediaplayerservice/StagefrightRecorder.cpp:1465:20:
error: 'PROPERTY_VALUE_MAX' was not declared in this scope
frameworks/av/media/libmediaplayerservice/StagefrightRecorder.cpp:1466:57:
error: 'value' was not declared in this scope
frameworks/av/media/libmediaplayerservice/StagefrightRecorder.cpp:1466:70:
error: 'property_get' was not declared in this scope
make: *** [/android/mydroid-cm10/out/target/product/xt926/obj/
SHARED_LIBRARIES/libmediaplayerservice_intermediates/StagefrightRecorder.o]
Error 1

Change-Id: I346300231f977082314b05e09184ea519b50c719