Fallback to AOSP emergency info if the original intent is broken

If the variant of emergency info is broken, we should try to show
AOSP emergency info instead.

Test: Rebuilt rom and see the Ui. Run robo test
Fix: 154114259
Change-Id: I5bc3f6cbf9102a7b7299c3edf718a58101effbf8

tests/robotests/src/com/android/settings/accounts/EmergencyInfoPreferenceControllerTest.java

@@ -156,10 +156,11 @@ public class EmergencyInfoPreferenceControllerTest {
         final Preference preference = new Preference(activity);
         preference.setKey("emergency_info");
         mController = new EmergencyInfoPreferenceController(activity, preference.getKey());
+        mController.mIntent = new Intent("com.example.action.new").setPackage("com.example.test");
 
         mController.handlePreferenceTreeClick(preference);
 
         assertThat(application.getNextStartedActivity().getAction())
-                .isEqualTo("android.settings.EDIT_EMERGENCY_INFO");
+                .isEqualTo("com.example.action.new");
     }
 }