All Apps transition with gradient and scrim.

The transition is behind a feature flag and
turned off by default.

Change-Id: I155840ba82b5a573d874376797db5f739a52d706
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 90dc2ef..756a853 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -466,7 +466,9 @@
     @Override
     public void onExtractedColorsChanged() {
         loadExtractedColorsAndColorItems();
-
+        if (mAllAppsController != null) {
+            mAllAppsController.onExtractedColorsChanged();
+        }
         if (mLauncherCallbacks != null) {
             mLauncherCallbacks.onExtractedColorsChanged();
         }