Add and enable multichannel for audio resampler

Change-Id: I2b86fb73d70abc4c456f7567270a888086b301d4
Signed-off-by: Andy Hung <hunga@google.com>
diff --git a/services/audioflinger/AudioResamplerDyn.h b/services/audioflinger/AudioResamplerDyn.h
index 8c56319..3dced8a 100644
--- a/services/audioflinger/AudioResamplerDyn.h
+++ b/services/audioflinger/AudioResamplerDyn.h
@@ -110,12 +110,10 @@
     void createKaiserFir(Constants &c, double stopBandAtten,
             int inSampleRate, int outSampleRate, double tbwCheat);
 
-    void setResampler(unsigned resampleType);
-
     template<int CHANNELS, bool LOCKED, int STRIDE>
     void resample(TO* out, size_t outFrameCount, AudioBufferProvider* provider);
 
-    // declare a pointer to member function for resample
+    // define a pointer to member function type for resample
     typedef void (AudioResamplerDyn<TC, TI, TO>::*resample_ABP_t)(TO* out,
             size_t outFrameCount, AudioBufferProvider* provider);