Show biometric-specific dialog when appropriate

1) We need to pass a "restriction" string from settings to the dialog,
   otherwise the biometric dialog could be shown in non-biometric
   flows
2) Updates ActionDisabledByAdminDialogHelper to pass the restrition
   to be taken into consideration when creating the controller
3) Sets an optional onClickListener on the positive button.

Bug: 5788943
Test: atest ParentalControlsUtilsTest
Change-Id: Iedff7fef50e186b2779f061f37d3080c910d2179

tests/unit/src/com/android/settings/biometrics/ParentalControlsUtilsTest.java

@@ -35,6 +35,7 @@ import static android.hardware.biometrics.BiometricAuthenticator.TYPE_IRIS;
 
 import android.hardware.biometrics.BiometricAuthenticator;
 import android.os.UserHandle;
+import android.os.UserManager;
 
 import androidx.annotation.Nullable;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -92,6 +93,7 @@ public class ParentalControlsUtilsTest {
                     mSupervisionComponentName, tests[i][0] /* modality */,
                     tests[i][1] /* keyguardDisableFlags */);
             assertNotNull(admin);
+            assertEquals(UserManager.DISALLOW_BIOMETRIC, admin.enforcedRestriction);
             assertEquals(mSupervisionComponentName, admin.component);
         }
     }