Modify Taskbar code to accommodate bubble bar gesture to stash/unstash

* Bubble bar typically follows the behavior of taskbar - if taskbar
  is shown, the bubble bar is shown, if taskbar hides, bubble bar
  hides.
* The bubble bar has 3 states: stashed, collapsed (unstashed but
  the bubbles are not expanded), and expanded. When bubbles are
  expanded, this means WMShell is rendering the bubble
  expanded view. In this situation taskbar becomes collapsed.

Bug: 253318833
Test: manual - flag turned on - see go/bubble-bar-tests
Test: manual - flag turned off:
             - launch an app, ensure taskbar is stashed
             - unstash taskbar, drag down on taskbar, ensure it
               becomes stashed
             - be in an app, unstash taskbar, interact with the app,
               ensure taskbar is stashed
             - be in an app, unstash taskbar, select an app from it,
               ensure taskbar is stashed & app is opened
Flag: WM_BUBBLE_BAR
Change-Id: I7b481d768182c8429160ab4a9b213b885a7d78bc

quickstep/src/com/android/launcher3/taskbar/bubbles/BubbleBarViewController.java

@@ -28,6 +28,8 @@ import com.android.launcher3.R;
 import com.android.launcher3.anim.AnimatedFloat;
 import com.android.launcher3.taskbar.TaskbarActivityContext;
 import com.android.launcher3.taskbar.TaskbarControllers;
+import com.android.launcher3.taskbar.TaskbarInsetsController;
+import com.android.launcher3.taskbar.TaskbarStashController;
 import com.android.launcher3.util.MultiPropertyFactory;
 import com.android.launcher3.util.MultiValueAlpha;
 import com.android.quickstep.SystemUiProxy;
@@ -51,6 +53,8 @@ public class BubbleBarViewController {
     // Initialized in init.
     private BubbleStashController mBubbleStashController;
     private BubbleBarController mBubbleBarController;
+    private TaskbarStashController mTaskbarStashController;
+    private TaskbarInsetsController mTaskbarInsetsController;
     private View.OnClickListener mBubbleClickListener;
     private View.OnClickListener mBubbleBarClickListener;
 
@@ -80,6 +84,8 @@ public class BubbleBarViewController {
     public void init(TaskbarControllers controllers, BubbleControllers bubbleControllers) {
         mBubbleStashController = bubbleControllers.bubbleStashController;
         mBubbleBarController = bubbleControllers.bubbleBarController;
+        mTaskbarStashController = controllers.taskbarStashController;
+        mTaskbarInsetsController = controllers.taskbarInsetsController;
 
         mActivity.addOnDeviceProfileChangeListener(dp ->
                 mBarView.getLayoutParams().height = mActivity.getDeviceProfile().taskbarHeight
@@ -89,7 +95,9 @@ public class BubbleBarViewController {
         mBubbleClickListener = v -> onBubbleClicked(v);
         mBubbleBarClickListener = v -> setExpanded(true);
         mBarView.setOnClickListener(mBubbleBarClickListener);
-        // TODO: when barView layout changes tell taskbarInsetsController the insets have changed.
+        mBarView.addOnLayoutChangeListener((view, i, i1, i2, i3, i4, i5, i6, i7) ->
+                mTaskbarInsetsController.onTaskbarOrBubblebarWindowHeightOrInsetsChanged()
+        );
     }
 
     private void onBubbleClicked(View v) {
@@ -283,7 +291,8 @@ public class BubbleBarViewController {
                 } else {
                     Log.w(TAG, "trying to expand bubbles when there isn't one selected");
                 }
-                // TODO: Tell taskbar stash controller to stash without bubbles following
+                mTaskbarStashController.updateAndAnimateTransientTaskbar(true /* stash */,
+                        false /* shouldBubblesFollow */);
             }
         }
     }