It's lights out for you, navigation bar!

Views requesting lights out mode will cause the navbar to
disappear (this is useful for viewing videos/photos/etc
using every pixel of the screen).

But there's a catch: any user activity at all will cause the
lights to come back on and the navbar to return.

Change-Id: I535ed3ba9ae7fab3282c402be256add765395b6f
diff --git a/services/java/com/android/server/StatusBarManagerService.java b/services/java/com/android/server/StatusBarManagerService.java
index 8df8177..1d2072c 100644
--- a/services/java/com/android/server/StatusBarManagerService.java
+++ b/services/java/com/android/server/StatusBarManagerService.java
@@ -122,6 +122,11 @@
     // ================================================================================
     // From IStatusBarService
     // ================================================================================
+    public void userActivity() {
+        if (mBar != null) try {
+            mBar.userActivity();
+        } catch (RemoteException ex) {}
+    }
     public void expand() {
         enforceExpandStatusBar();