Use audio_session_t consistently

Bug: 27562099
Change-Id: I328d8226191386b163f2ace41233607294c50dcd
diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index 7e502af..53b6df6 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -63,7 +63,7 @@
     mLeftVolume = mRightVolume = 1.0;
     mVideoWidth = mVideoHeight = 0;
     mLockThreadId = 0;
-    mAudioSessionId = AudioSystem::newAudioUniqueId(AUDIO_UNIQUE_ID_USE_SESSION);
+    mAudioSessionId = (audio_session_t) AudioSystem::newAudioUniqueId(AUDIO_UNIQUE_ID_USE_SESSION);
     AudioSystem::acquireAudioSessionId(mAudioSessionId, -1);
     mSendLevel = 0;
     mRetransmitEndpointValid = false;
@@ -648,7 +648,7 @@
     return OK;
 }
 
-status_t MediaPlayer::setAudioSessionId(int sessionId)
+status_t MediaPlayer::setAudioSessionId(audio_session_t sessionId)
 {
     ALOGV("MediaPlayer::setAudioSessionId(%d)", sessionId);
     Mutex::Autolock _l(mLock);
@@ -667,7 +667,7 @@
     return NO_ERROR;
 }
 
-int MediaPlayer::getAudioSessionId()
+audio_session_t MediaPlayer::getAudioSessionId()
 {
     Mutex::Autolock _l(mLock);
     return mAudioSessionId;