Fix home controls showing on low light dream

Low light should never show complications, so short circuit early and
don't return any in the state controller.

Bug: 277746325
Test: atest DreamOverlayStateControllerTest
Change-Id: Iae6388dafa69098b70e9229bc562172fec1fb149

packages/SystemUI/src/com/android/systemui/dreams/DreamOverlayStateController.java

@@ -182,6 +182,10 @@ public class DreamOverlayStateController implements
      * Returns collection of present {@link Complication}.
      */
     public Collection<Complication> getComplications(boolean filterByAvailability) {
+        if (isLowLightActive()) {
+            // Don't show complications on low light.
+            return Collections.emptyList();
+        }
         return Collections.unmodifiableCollection(filterByAvailability
                 ? mComplications
                 .stream()

packages/SystemUI/tests/src/com/android/systemui/dreams/DreamOverlayStateControllerTest.java

@@ -234,6 +234,23 @@ public class DreamOverlayStateControllerTest extends SysuiTestCase {
                 .isTrue();
     }
 
+    @Test
+    public void testComplicationsNotShownForLowLight() {
+        final Complication complication = Mockito.mock(Complication.class);
+        final DreamOverlayStateController stateController = getDreamOverlayStateController(true);
+
+        // Add a complication and verify it's returned in getComplications.
+        stateController.addComplication(complication);
+        mExecutor.runAllReady();
+        assertThat(stateController.getComplications().contains(complication))
+                .isTrue();
+
+        stateController.setLowLightActive(true);
+        mExecutor.runAllReady();
+
+        assertThat(stateController.getComplications()).isEmpty();
+    }
+
     @Test
     public void testNotifyLowLightChanged() {
         final DreamOverlayStateController stateController = getDreamOverlayStateController(true);