Re-fixing content descritpion on quick settings toggle.

Bug: 7362316

Change-Id: I6d4afbcbfbe3e38a6bdd080bc60409854de08251

Author: caseyburkhardt

packages/SystemUI/res/layout/status_bar_expanded_header.xml

@@ -94,7 +94,7 @@
             android:scaleType="center"
             android:src="@drawable/ic_notify_settings"
             android:background="@drawable/ic_notify_button_bg"
-            android:contentDescription="@string/accessibility_settings_button"
+            android:contentDescription="@string/accessibility_desc_quick_settings"
             />
         <ImageView android:id="@+id/notification_button"
             android:layout_width="50dp"