Frameworks/base: Unused parameters in hwui

Remove Clang cutout for unused parameters. Fix warnings.

Remove Clang cutout for deprecated Skia function usage. Has been
fixed in the L push.

Change-Id: I7ea073ff67127cc1e14e798b655e2c50615fe8e7
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index c6ea82b..8fd39cd 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -344,14 +344,16 @@
     }
 }
 
+template <typename T>
+void UNUSED(T) {}
+
+
 CREATE_BRIDGE0(fence) {
     // Intentionally empty
+    UNUSED(args);
     return NULL;
 }
 
-template <typename T>
-void UNUSED(T t) {}
-
 void RenderProxy::fence() {
     SETUP_TASK(fence);
     UNUSED(args);