Support 180-degree screen rotation for RSB.

Bug: 17961466
Change-Id: I640c79e18a524ce03a5215ca5669b920a0fa2642
diff --git a/services/inputflinger/InputReader.h b/services/inputflinger/InputReader.h
index 157fa4f..803dcc9 100644
--- a/services/inputflinger/InputReader.h
+++ b/services/inputflinger/InputReader.h
@@ -1226,6 +1226,7 @@
 
     int32_t mSource;
     float mScalingFactor;
+    int32_t mOrientation;
 
     void sync(nsecs_t when);
 };