TimestretchBufferProvider integration with Sonic Library

Using Sonic as backbone for time stretching algorithm.
Adding libsonic to needed makefiles.

bug: 19196501
Change-Id: I1ea9221d2f56e4e79fba8746ce0ad350b5079e82
diff --git a/media/mediaserver/Android.mk b/media/mediaserver/Android.mk
index 0e2e48c..ba47172 100644
--- a/media/mediaserver/Android.mk
+++ b/media/mediaserver/Android.mk
@@ -45,7 +45,8 @@
     frameworks/av/services/mediaresourcemanager \
     $(call include-path-for, audio-utils) \
     frameworks/av/services/soundtrigger \
-    frameworks/av/services/radio
+    frameworks/av/services/radio \
+    external/sonic
 
 LOCAL_MODULE:= mediaserver
 LOCAL_32_BIT_ONLY := true