Use audio_stream_type_t consistently

At native level it was a mixture of audio_stream_type_t, int, uint32_t,
and uint8_t.  Java is still int.  Also fixed a couple of hard-coded -1
instead of AUDIO_STREAM_DEFAULT, and in startToneCommand a hard-coded 0
instead of AUDIO_STREAM_VOICE_CALL.

Change-Id: Ia33bfd70edca8c2daec9052984b369cd8eee2a83
diff --git a/include/media/IMediaPlayer.h b/include/media/IMediaPlayer.h
index e905903..6425886 100644
--- a/include/media/IMediaPlayer.h
+++ b/include/media/IMediaPlayer.h
@@ -21,6 +21,7 @@
 #include <binder/IInterface.h>
 #include <binder/Parcel.h>
 #include <utils/KeyedVector.h>
+#include <system/audio.h>
 
 namespace android {
 
@@ -51,7 +52,7 @@
     virtual status_t        getCurrentPosition(int* msec) = 0;
     virtual status_t        getDuration(int* msec) = 0;
     virtual status_t        reset() = 0;
-    virtual status_t        setAudioStreamType(int type) = 0;
+    virtual status_t        setAudioStreamType(audio_stream_type_t type) = 0;
     virtual status_t        setLooping(int loop) = 0;
     virtual status_t        setVolume(float leftVolume, float rightVolume) = 0;
     virtual status_t        setAuxEffectSendLevel(float level) = 0;