Don't show private notifications if a secure lockscreen is merely occluded.

Bug: 15430088
Change-Id: I27187216462b5bb7d52c3f85b9444348138fd9ea

packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

@@ -2851,7 +2851,9 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
     }
 
     private void updatePublicMode() {
-        setLockscreenPublicMode(mState == StatusBarState.KEYGUARD
+        setLockscreenPublicMode(
+                (mStatusBarKeyguardViewManager.isShowing() || 
+                    mStatusBarKeyguardViewManager.isOccluded())
                 && mStatusBarKeyguardViewManager.isSecure());
     }
 

packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBarKeyguardViewManager.java

@@ -181,6 +181,10 @@ public class StatusBarKeyguardViewManager {
         reset();
     }
 
+    public boolean isOccluded() {
+        return mOccluded;
+    }
+
     /**
      * Hides the keyguard view
      */