Clean unused parameters, disable warnings

Change-Id: Iddb872f53075dd022eeef45265594d1c6a9e2bc0
diff --git a/libs/hwui/Android.mk b/libs/hwui/Android.mk
index 411c133..ce8364e 100644
--- a/libs/hwui/Android.mk
+++ b/libs/hwui/Android.mk
@@ -58,6 +58,7 @@
 		external/skia/include/utils
 
 	LOCAL_CFLAGS += -DUSE_OPENGL_RENDERER -DEGL_EGLEXT_PROTOTYPES -DGL_GLEXT_PROTOTYPES
+	LOCAL_CFLAGS += -Wno-unused-parameter
 	LOCAL_MODULE_CLASS := SHARED_LIBRARIES
 	LOCAL_SHARED_LIBRARIES := liblog libcutils libutils libEGL libGLESv2 libskia libui
 	LOCAL_MODULE := libhwui