Make settings icon invisible when QS is collapsed.

Also fix calling super#onAttachedToWindow in QuickStatusBarHeader.

Change-Id: I2eb8c31b2d3a9ca20ac76608650a0e42ec25e504
Fixes: 78203022
Test: visual
diff --git a/packages/SystemUI/src/com/android/systemui/qs/QuickStatusBarHeader.java b/packages/SystemUI/src/com/android/systemui/qs/QuickStatusBarHeader.java
index 5d7dcbb..2dcb723 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/QuickStatusBarHeader.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/QuickStatusBarHeader.java
@@ -366,6 +366,7 @@
 
     @Override
     public void onAttachedToWindow() {
+        super.onAttachedToWindow();
         Dependency.get(StatusBarIconController.class).addIconGroup(mIconManager);
         requestApplyInsets();
     }