Setup external/robolectric for SettingsRoboTests

Current failing tests: ab/I64100010182936387
Had to Ignore some of com.android.settings.accessibility tests, which will be fixed separately

Bug: 261728063
Test: atest SettingsRoboTests -- --test-arg com.android.tradefed.testtype.IsolatedHostTest:java-flags:-XX:CompressedClassSpaceSize=3g

Change-Id: I4a0cb992db924936826e0c9808accc78dddb5f30

tests/robotests/src/com/android/settings/applications/manageapplications/ManageApplicationsTest.java

@@ -76,8 +76,12 @@ import org.robolectric.util.ReflectionHelpers;
 import java.util.ArrayList;
 
 @RunWith(RobolectricTestRunner.class)
-@Config(shadows = {ShadowUserManager.class, ShadowAppUtils.class,
-        ShadowInteractionJankMonitor.class})
+@Config(shadows = {
+        ShadowUserManager.class,
+        ShadowAppUtils.class,
+        ShadowInteractionJankMonitor.class,
+        com.android.settings.testutils.shadow.ShadowFragment.class,
+})
 public class ManageApplicationsTest {
 
     @Mock