Fix a bug where custom cards are not refresh when removed

When the last custom card for a specific type is removed,
onContextualCardUpdated should receive the cardtype info so we can
remove it from main data set.

- Reverted onContextualCardUpdated method signature back to before
- Force ConditionContextualCardController to send an empty list if
  everything is removed.

* Note: the update logic is pretty complicated to handle
  add/update/remove all together. In the future we should consider
  spliting the removal logic to simplify this area.

Change-Id: Ied688deb693ec33e0017be02cf5c743a754a6e61
Fixes: 115572494
Test: visual

tests/robotests/src/com/android/settings/homepage/conditional/ConditionContextualCardControllerTest.java

@@ -82,7 +82,7 @@ public class ConditionContextualCardControllerTest {
 
         mController.onConditionsChanged();
 
-        verify(mController).onDataUpdated(any());
+        verify(mListener).onContextualCardUpdated(any());
     }
 
     @Test
@@ -94,7 +94,7 @@ public class ConditionContextualCardControllerTest {
 
         mController.onConditionsChanged();
 
-        verify(mController, never()).onDataUpdated(any());
+        verify(mListener, never()).onContextualCardUpdated(any());
     }
 
     private class FakeConditionalCard implements ConditionalCard {