Clean up after test

Test: atest SystemUITests
Fixes: 218884426
Change-Id: I1d0499036f05a2a3bd64cee3f51b110daada4d77

packages/SystemUI/tests/src/com/android/keyguard/KeyguardSliceViewControllerTest.java

@@ -32,6 +32,7 @@ import com.android.systemui.plugins.ActivityStarter;
 import com.android.systemui.statusbar.policy.ConfigurationController;
 import com.android.systemui.tuner.TunerService;
 
+import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -66,6 +67,11 @@ public class KeyguardSliceViewControllerTest extends SysuiTestCase {
         mController.setupUri(KeyguardSliceProvider.KEYGUARD_SLICE_URI);
     }
 
+    @After
+    public void tearDown() {
+        mController.onViewDetached();
+    }
+
     @Test
     public void refresh_replacesSliceContentAndNotifiesListener() {
         mController.refresh();