Attempt to fix blank keyguard issue

This is an attempt to fix bug 7137389. It forces a layout when the screen
comes back on, which should alleviate the issue.

Change-Id: I00a3829f1662a8db99d947856ca11660b4bfb805

Author: Jim Miller

policy/src/com/android/internal/policy/impl/keyguard/KeyguardHostView.java

@@ -496,6 +496,11 @@ public void onScreenTurnedOn() {
         if (DEBUG) Log.d(TAG, "screen on");
         showSecurityScreen(mCurrentSecuritySelection);
         getSecurityView(mCurrentSecuritySelection).onResume();
+
+        // This is a an attempt to fix bug 7137389 where the device comes back on but the entire
+        // layout is blank but forcing a layout causes it to reappear (e.g. with with
+        // hierarchyviewer).
+        requestLayout();
     }
 
     @Override