Measurements have shown that the audio track in streaming mode
is pretty efficient as is, thanks to dalvik's JNI implementation.
Also, in streaming mode write( ) blocks until all data has been
copied to the mixer, which is the kind of behaviour we want so
that we don't have to explicitly block in our code. Also,
the java AudioTrack is thread-safe with respect to stop( ) calls
during write, which means we can do everything completeAudioAvailable
did, just as efficiently without it.
Change-Id: I70a8a108d94c7260676673979b5ea29f37fa5db4
c3da8818f0