Update changelog and fix unit test.

Author: rosalyntan

appcheck/firebase-appcheck/CHANGELOG.md

@@ -1,4 +1,5 @@
 # Unreleased
+* [changed] Migrated the `firebase-appcheck` library to use standard Firebase executors. (#4431)
 
 # 16.1.0
 * [unchanged] Updated to accommodate the release of the updated

appcheck/firebase-appcheck/src/test/java/com/google/firebase/appcheck/FirebaseAppCheckRegistrarTest.java

@@ -17,10 +17,15 @@
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.firebase.FirebaseApp;
+import com.google.firebase.annotations.concurrent.Background;
+import com.google.firebase.annotations.concurrent.Blocking;
 import com.google.firebase.components.Component;
 import com.google.firebase.components.Dependency;
+import com.google.firebase.components.Qualified;
 import com.google.firebase.heartbeatinfo.HeartBeatController;
 import java.util.List;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ScheduledExecutorService;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.robolectric.RobolectricTestRunner;
@@ -39,6 +44,9 @@ public void testGetComponents() {
     assertThat(firebaseAppCheckComponent.getDependencies())
         .containsExactly(
             Dependency.required(FirebaseApp.class),
+            Dependency.required(Qualified.qualified(Background.class, ExecutorService.class)),
+            Dependency.required(
+                Qualified.qualified(Blocking.class, ScheduledExecutorService.class)),
             Dependency.optionalProvider(HeartBeatController.class));
     assertThat(firebaseAppCheckComponent.isAlwaysEager()).isTrue();
   }