Handle messages to update Launcher preview color

Receive color update messages with a list of color resource ids and a
corresponding list of color overrides, and adjust the preview
accordingly.

Flag: com.android.systemui.shared.new_customization_picker_ui
Test: manually verified that the selected colors are previewed
Bug: 350718581
Change-Id: Ibcde0575416df00b76627ac1004f21f5f9af1196

src/com/android/launcher3/graphics/GridCustomizationsProvider.java

@@ -95,6 +95,7 @@ public class GridCustomizationsProvider extends ContentProvider {
 
     private static final int MESSAGE_ID_UPDATE_PREVIEW = 1337;
     private static final int MESSAGE_ID_UPDATE_GRID = 7414;
+    private static final int MESSAGE_ID_UPDATE_COLOR = 856;
 
     // Set of all active previews used to track duplicate memory allocations
     private final Set<PreviewLifecycleObserver> mActivePreviews =
@@ -289,6 +290,11 @@ public class GridCustomizationsProvider extends ContentProvider {
                         renderer.updateGrid(gridName);
                     }
                     break;
+                case MESSAGE_ID_UPDATE_COLOR:
+                    if (Flags.newCustomizationPickerUi()) {
+                        renderer.previewColor(message.getData());
+                    }
+                    break;
                 default:
                     // Unknown command, destroy lifecycle
                     Log.d(TAG, "Unknown preview command: " + message.what + ", destroying preview");