WindowOrientationListener: Check if proposed rotation is in range

* Some OEMs *coughs OnePlus* decided it was a great idea to add a fourth kind of rotation ( flat )

Change-Id: I54c6e6360e897fbc8445edabbf411807521c624b

services/core/java/com/android/server/policy/WindowOrientationListener.java

@@ -1047,8 +1047,14 @@ public abstract class WindowOrientationListener {
         @Override
         public void onSensorChanged(SensorEvent event) {
             int newRotation;
+
+            int reportedRotation = (int) event.values[0];
+            if (reportedRotation < 0 || reportedRotation > 3) {
+                return;
+            }
+
             synchronized (mLock) {
-                mDesiredRotation = (int) event.values[0];
+                mDesiredRotation = reportedRotation;
                 newRotation = evaluateRotationChangeLocked();
             }
             if (newRotation >=0) {