Launch DO/PO sepecific settings when parental are enabled.

Test: make RunSettingsRoboTests && manual
Bug: 161861348

Change-Id: I73ce27d0aa740f47e6ed3e4be9bee4d5eaf039ad

src/com/android/settings/enterprise/EnterprisePrivacyFeatureProvider.java

@@ -137,4 +137,10 @@ public interface EnterprisePrivacyFeatureProvider {
      * info" page. Returns {@code true} if the activity has indeed been launched.
      */
     boolean showWorkPolicyInfo();
+
+    /**
+     * Launches the parental controls settings page. Returns {@code true} if the activity has
+     * been launched.
+     */
+    boolean showParentalControls();
 }