Demo hack!

To make a 800 tall screen run like a 720:

adb shell setprop persist.demo.screensizehack 800=720

Note this is a persistent property, so it will (intentionally) remain across boots.

Change-Id: I8a8a9f937399327444e8fb154b91f0e642db116e
diff --git a/services/java/com/android/server/WindowManagerService.java b/services/java/com/android/server/WindowManagerService.java
index 26dd692..748f2e9 100644
--- a/services/java/com/android/server/WindowManagerService.java
+++ b/services/java/com/android/server/WindowManagerService.java
@@ -6239,7 +6239,8 @@
             mDisplay = wm.getDefaultDisplay();
             mInitialDisplayWidth = mDisplay.getWidth();
             mInitialDisplayHeight = mDisplay.getHeight();
-            mInputManager.setDisplaySize(0, mInitialDisplayWidth, mInitialDisplayHeight);
+            mInputManager.setDisplaySize(0, Display.unmapDisplaySize(mInitialDisplayWidth),
+                    Display.unmapDisplaySize(mInitialDisplayHeight));
         }
 
         try {