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

Bug: 73750212
Bug: 64012357
Test: make RunSettingsGoogleRoboTests

Change-Id: I586eaccaebb89a8b3e5b4014b3d6427ab2eb15a9

tests/robotests/src/com/android/settings/enterprise/EnterprisePrivacyFeatureProviderImplTest.java

@@ -347,6 +347,15 @@ public class EnterprisePrivacyFeatureProviderImplTest {
                 .isEqualTo(3);
     }
 
+    @Test
+    public void testAreBackupsMandatory() {
+        assertThat(mProvider.areBackupsMandatory()).isFalse();
+        ComponentName transportComponent = new ComponentName("test", "test");
+        when(mDevicePolicyManager.getMandatoryBackupTransport())
+                .thenReturn(transportComponent);
+        assertThat(mProvider.areBackupsMandatory()).isTrue();
+    }
+
     private void resetAndInitializePackageManagerWrapper() {
         reset(mPackageManagerWrapper);
         when(mPackageManagerWrapper.hasSystemFeature(PackageManager.FEATURE_DEVICE_ADMIN))