AudioSystem: remove unused stream type

The audio stream type is not used in the getSampleRate() and
 getFrameCount() methods.

Change-Id: I3d065ae272bd039204cd323cdab9b60460034f2d
diff --git a/media/libmedia/AudioTrack.cpp b/media/libmedia/AudioTrack.cpp
index 7d3ecc5..6989aaf 100644
--- a/media/libmedia/AudioTrack.cpp
+++ b/media/libmedia/AudioTrack.cpp
@@ -647,7 +647,7 @@
     if (isOffloaded_l()) {
         if (mOutput != AUDIO_IO_HANDLE_NONE) {
             uint32_t sampleRate = 0;
-            status_t status = AudioSystem::getSamplingRate(mOutput, mStreamType, &sampleRate);
+            status_t status = AudioSystem::getSamplingRate(mOutput, &sampleRate);
             if (status == NO_ERROR) {
                 mSampleRate = sampleRate;
             }
@@ -887,16 +887,16 @@
     }
 
     size_t afFrameCount;
-    status = AudioSystem::getFrameCount(output, mStreamType, &afFrameCount);
+    status = AudioSystem::getFrameCount(output, &afFrameCount);
     if (status != NO_ERROR) {
-        ALOGE("getFrameCount(output=%d, streamType=%d) status %d", output, mStreamType, status);
+        ALOGE("getFrameCount(output=%d) status %d", output, status);
         goto release;
     }
 
     uint32_t afSampleRate;
-    status = AudioSystem::getSamplingRate(output, mStreamType, &afSampleRate);
+    status = AudioSystem::getSamplingRate(output, &afSampleRate);
     if (status != NO_ERROR) {
-        ALOGE("getSamplingRate(output=%d, streamType=%d) status %d", output, mStreamType, status);
+        ALOGE("getSamplingRate(output=%d) status %d", output, status);
         goto release;
     }