don't clear notification effects in response to peeks

When the heads up appears it generates a visibility event for the panel.
This always clears the notification effects (buzz, beep, blink).
If we suppress that for heads up notifications, we never get another chance.
So we add a new call when we open the shade from the heads up to catch this case.

Bug: 20947591
Change-Id: I233e5346617ca2fce7851bd85154c838849df8f7
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
index a5684a4..920b682 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tv/TvStatusBar.java
@@ -125,6 +125,11 @@
     }
 
     @Override
+    protected boolean isPanelFullyCollapsed() {
+        return false;
+    }
+
+    @Override
     protected int getMaxKeyguardNotifications() {
         return 0;
     }