Add memory leak tracking/debugging code to drm server

bug - 4099038

Change-Id: I6c048eaf3d7f34bc144b8daaa5fdef1ed474af66
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index fd4c6c6..a04fbd2 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -33,6 +33,7 @@
     IEffectClient.cpp \
     AudioEffect.cpp \
     Visualizer.cpp \
+    MemoryLeakTrackUtil.cpp \
     fixedfft.cpp.arm
 
 LOCAL_SHARED_LIBRARIES := \