Merge tag 'android-4.4.3_r1' into HEAD

Android 4.4.3 release 1

Conflicts:
	media/libmedia/AudioTrack.cpp
	media/libstagefright/ACodec.cpp
	media/libstagefright/MPEG4Extractor.cpp
	media/libstagefright/MPEG4Writer.cpp
	media/libstagefright/TimedEventQueue.cpp
	media/libstagefright/Utils.cpp
	media/libstagefright/matroska/MatroskaExtractor.cpp
	services/audioflinger/Threads.cpp

(cherry picked from commit 82900d8e40bf8a9078d5ebaba1cc6df34c5a361d)