Pass in navigation bar panel context created by task bar when taskbar navbar unification is on

When the flag is on, task bar is created with window context navigation bar. The floating rotation button window context should be in navigation bar panel.

Fixes: 309930089
Test: N/A
Change-Id: I730a4b898d9fb65cc5d7544dcb37dfe32d49a632

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

@@ -53,6 +53,7 @@ import android.animation.ObjectAnimator;
 import android.annotation.DrawableRes;
 import android.annotation.IdRes;
 import android.annotation.LayoutRes;
+import android.content.Context;
 import android.content.pm.ActivityInfo.Config;
 import android.content.res.ColorStateList;
 import android.content.res.Resources;
@@ -80,6 +81,8 @@ import android.widget.FrameLayout;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 
+import androidx.annotation.Nullable;
+
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.LauncherAnimUtils;
 import com.android.launcher3.R;
@@ -146,6 +149,7 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
     private int mState;
 
     private final TaskbarActivityContext mContext;
+    private final @Nullable Context mNavigationBarPanelContext;
     private final WindowManagerProxy mWindowManagerProxy;
     private final FrameLayout mNavButtonsView;
     private final LinearLayout mNavButtonContainer;
@@ -203,8 +207,10 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
     private final RecentsHitboxExtender mHitboxExtender = new RecentsHitboxExtender();
     private ImageView mRecentsButton;
 
-    public NavbarButtonsViewController(TaskbarActivityContext context, FrameLayout navButtonsView) {
+    public NavbarButtonsViewController(TaskbarActivityContext context,
+            @Nullable Context navigationBarPanelContext, FrameLayout navButtonsView) {
         mContext = context;
+        mNavigationBarPanelContext = navigationBarPanelContext;
         mWindowManagerProxy = WindowManagerProxy.INSTANCE.get(mContext);
         mNavButtonsView = navButtonsView;
         mNavButtonContainer = mNavButtonsView.findViewById(R.id.end_nav_buttons);
@@ -312,7 +318,8 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
             rotationButton.hide();
             mControllers.rotationButtonController.setRotationButton(rotationButton, null);
         } else {
-            mFloatingRotationButton = new FloatingRotationButton(mContext,
+            mFloatingRotationButton = new FloatingRotationButton(
+                    ENABLE_TASKBAR_NAVBAR_UNIFICATION ? mNavigationBarPanelContext : mContext,
                     R.string.accessibility_rotate_button,
                     R.layout.rotate_suggestion,
                     R.id.rotate_suggestion,