Enable/disable support buttons based on operation hours.

Also update support title based on whether support operation is
available.

Bug: 28827790
Change-Id: I65eb70d18ba16ccc263bce019fcbbe5e10ffa596

src/com/android/settings/overlay/SupportFeatureProvider.java

@@ -48,6 +48,16 @@ public interface SupportFeatureProvider {
      */
     boolean isSupportTypeEnabled(Context context, @SupportType int type);
 
+    /**
+     * Whether or not a support type is in operation 24/7.
+     */
+    boolean isAlwaysOperating(@SupportType int type);
+
+    /**
+     * Whether or not a support type is operating now.
+     */
+    boolean isOperatingNow(@SupportType int type);
+
     /**
      * Returns a localized string indicating estimated wait time for a support time.
      */