Enterprice privacy: let the user know if admin enabled backups.

Bug: 73750212
Bug: 64012357
Test: make RunSettingsGoogleRoboTests

Change-Id: I586eaccaebb89a8b3e5b4014b3d6427ab2eb15a9

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

@@ -124,4 +124,9 @@ public interface EnterprisePrivacyFeatureProvider {
      * profile (if any).
      */
     int getNumberOfActiveDeviceAdminsForCurrentUserAndManagedProfile();
+
+    /*
+     * Returns whether backups are mandatory.
+     */
+    boolean areBackupsMandatory();
 }