Frameworks/base: Wall Werror in libs/input

Enable -Wall -Werror in libs/input. Mask warnings from Skia.

Change-Id: I0deeffde07fcf3a09eadec2852e9bf5666b55ee8
diff --git a/libs/input/SpriteController.cpp b/libs/input/SpriteController.cpp
index 5391393..0bc832a 100644
--- a/libs/input/SpriteController.cpp
+++ b/libs/input/SpriteController.cpp
@@ -24,11 +24,15 @@
 #include <utils/String8.h>
 #include <gui/Surface.h>
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include <SkBitmap.h>
 #include <SkCanvas.h>
 #include <SkColor.h>
 #include <SkPaint.h>
 #include <SkXfermode.h>
+#pragma GCC diagnostic pop
+
 #include <android/native_window.h>
 
 namespace android {