Adds the ability for Launcher3 to respond to QSB alpha change requests.

Test: Tested locally
BUG:124063782
Change-Id: I8c4bfaa62d9608fcfffff5e30b2913f3a6fb2f75
(cherry picked from commit 827f0807d3)

go/quickstep/src/com/android/quickstep/GoActivityControlHelper.java

@@ -33,6 +33,11 @@ public abstract class GoActivityControlHelper<T extends BaseDraggingActivity> im
         // Go does not support swipe up gesture.
     }
 
+    @Override
+    public void onAssistantVisibilityChanged(float visibility) {
+        // Go does not support assistant visibility transitions.
+    }
+
     @Override
     public HomeAnimationFactory prepareHomeUI(T activity) {
         // Go does not support gestures from app to home.

go/quickstep/src/com/android/quickstep/TouchInteractionService.java

@@ -83,6 +83,11 @@ public class TouchInteractionService extends Service {
             // TODO handle assistant
         }
 
+        @Override
+        public void onAssistantVisibilityChanged(float visibility) {
+            // TODO handle assistant
+        }
+
         /** Deprecated methods **/
         public void onQuickStep(MotionEvent motionEvent) { }
 

quickstep/recents_ui_overrides/src/com/android/quickstep/FallbackActivityControllerHelper.java

@@ -75,6 +75,11 @@ public final class FallbackActivityControllerHelper implements
         // TODO:
     }
 
+    @Override
+    public void onAssistantVisibilityChanged(float visibility) {
+        // TODO:
+    }
+
     @NonNull
     @Override
     public HomeAnimationFactory prepareHomeUI(RecentsActivity activity) {

quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityControllerHelper.java

@@ -45,6 +45,7 @@ import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherInitListener;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager;
+import com.android.launcher3.Workspace;
 import com.android.launcher3.allapps.AllAppsTransitionController;
 import com.android.launcher3.allapps.DiscoveryBounce;
 import com.android.launcher3.anim.AnimatorPlaybackController;
@@ -98,6 +99,14 @@ public final class LauncherActivityControllerHelper implements ActivityControlHe
         DiscoveryBounce.showForOverviewIfNeeded(activity);
     }
 
+    @Override
+    public void onAssistantVisibilityChanged(float visibility) {
+        Launcher launcher = getCreatedActivity();
+        if (launcher != null) {
+            launcher.setQuickSearchBarAlpha(1f - visibility);
+        }
+    }
+
     @NonNull
     @Override
     public HomeAnimationFactory prepareHomeUI(Launcher activity) {

quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java

@@ -125,6 +125,14 @@ public class TouchInteractionService extends Service {
             mAssistantAvailable = available;
         }
 
+        @Override
+        public void onAssistantVisibilityChanged(float visibility) {
+            MAIN_THREAD_EXECUTOR.execute(() -> {
+                mOverviewComponentObserver.getActivityControlHelper()
+                        .onAssistantVisibilityChanged(visibility);
+            });
+        }
+
         /** Deprecated methods **/
         public void onQuickStep(MotionEvent motionEvent) { }
 

quickstep/src/com/android/quickstep/ActivityControlHelper.java

@@ -53,6 +53,8 @@ public interface ActivityControlHelper<T extends BaseDraggingActivity> {
 
     void onSwipeUpComplete(T activity);
 
+    void onAssistantVisibilityChanged(float visibility);
+
     @NonNull HomeAnimationFactory prepareHomeUI(T activity);
 
     AnimationFactory prepareRecentsUI(T activity, boolean activityVisible,

src/com/android/launcher3/Launcher.java

@@ -408,6 +408,13 @@ public class Launcher extends BaseDraggingActivity implements LauncherExterns,
         onIdpChanged(idp);
     }
 
+    public void setQuickSearchBarAlpha(float alpha) {
+        View qsbAllApps = findViewById(R.id.search_container_all_apps);
+        if (qsbAllApps != null) {
+            qsbAllApps.setAlpha(alpha);
+        }
+    }
+
     private void onIdpChanged(InvariantDeviceProfile idp) {
         mUserEventDispatcher = null;