Position KQS to the bottom if opened via taskbar.

Bug: 368119679
Test: open KQS via taskbar, observe view at bottom of screen
      open KQS via keyboard, observe view at top of screen
Flag: com.android.launcher3.taskbar_overflow

Change-Id: I3e6f0d2ba51ec15cf7cb1f41ddc2a4414dfd60d6

quickstep/src/com/android/launcher3/taskbar/KeyboardQuickSwitchViewController.java

@@ -19,6 +19,7 @@ import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
 
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
+import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.animation.AnimationUtils;
 import android.window.RemoteTransition;
@@ -30,6 +31,7 @@ import com.android.internal.jank.Cuj;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.taskbar.overlay.TaskbarOverlayContext;
+import com.android.launcher3.views.BaseDragLayer;
 import com.android.quickstep.SystemUiProxy;
 import com.android.quickstep.util.GroupTask;
 import com.android.quickstep.util.SlideInRemoteTransition;
@@ -83,7 +85,9 @@ public class KeyboardQuickSwitchViewController {
             int currentFocusIndexOverride,
             boolean onDesktop,
             boolean hasDesktopTask,
-            boolean wasDesktopTaskFilteredOut) {
+            boolean wasDesktopTaskFilteredOut,
+            boolean wasOpenedFromTaskbar) {
+        positionView(wasOpenedFromTaskbar);
         mOverlayContext.getDragLayer().addView(mKeyboardQuickSwitchView);
         mOnDesktop = onDesktop;
         mWasDesktopTaskFilteredOut = wasDesktopTaskFilteredOut;
@@ -98,6 +102,19 @@ public class KeyboardQuickSwitchViewController {
                 /* useDesktopTaskView= */ !onDesktop && hasDesktopTask);
     }
 
+    protected void positionView(boolean wasOpenedFromTaskbar) {
+        if (!wasOpenedFromTaskbar) {
+            // Keep the default positioning.
+            return;
+        }
+
+        BaseDragLayer.LayoutParams lp = new BaseDragLayer.LayoutParams(
+                mKeyboardQuickSwitchView.getLayoutParams());
+        lp.width = BaseDragLayer.LayoutParams.WRAP_CONTENT;
+        lp.gravity = Gravity.BOTTOM | Gravity.CENTER_HORIZONTAL;
+        mKeyboardQuickSwitchView.setLayoutParams(lp);
+    }
+
     boolean isCloseAnimationRunning() {
         return mCloseAnimation != null;
     }