fix: update testcases for DefaultUserProfileServiceTest

Author: muzahidul-opti

user-profile/src/androidTest/java/com/optimizely/ab/android/user_profile/DefaultUserProfileServiceTest.java

@@ -104,19 +104,19 @@ public void teardown() {
         cache.delete(diskCache.getFileName());
     }
 
-//    @Test
-//    public void startInBackground() throws InterruptedException {
-//        DefaultUserProfileService ups = spy(DefaultUserProfileService.class);
-//
-//        CountDownLatch latch = new CountDownLatch(1);
-//        ups.startInBackground((u) -> {
-//            latch.countDown();
-//        });
-//
-//        latch.await(3, TimeUnit.SECONDS);
-//
-//        verify(ups).start();
-//    }
+    @Test
+    public void startInBackground() throws InterruptedException {
+        DefaultUserProfileService ups = spy(userProfileService);
+
+        CountDownLatch latch = new CountDownLatch(1);
+        ups.startInBackground((u) -> {
+            latch.countDown();
+        });
+
+        latch.await(3, TimeUnit.SECONDS);
+
+        verify(ups).start();
+    }
 
     @Test
     public void saveAndStartAndLookup() {