Update placement of the hotseat according to the bubble bar location.

Update the hotseat and Qsb placement according to the 3 nav buttons bar.

Test: Manual.
Set navigation mode to 3 buttons.
On launcher home screen move the bubble bar from one side to another.
Observe that the Hotseat and Qsb moving together with the navigation
bar.
Once moved the bubble bar, expand the bubble bar and collapse it.
Observe how the Hotseat is stashing and un-stashing.
After bubble bar changes position hit the recent apps button, observe
the transition.
On launcher home screen start application with the hotseat icon and exit
opened application. Observe that flying icon comes back to the correct
position in the hotseat.
Video with the above scenarios:
http://recall/-/gx8ASgewUeUS3QYohfrd1J/blTYrKopTyufOcRoPuVpYK
Bug: 346381754
Flag: com.android.wm.shell.enable_bubble_bar_in_persistent_task_bar

Change-Id: Ic8c6acdffbbb111cbe4f3fd6bc60195578d7035d

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

@@ -201,6 +201,8 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
 
     private final Rect mFloatingRotationButtonBounds = new Rect();
 
+    private @Nullable BubbleBarLocation mBubbleBarLocation;
+
     // Initialized in init.
     private TaskbarControllers mControllers;
     private boolean mIsImeRenderingNavButtons;
@@ -1174,6 +1176,7 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
     /** Adjusts navigation buttons layout accordingly to the bubble bar position. */
     @Override
     public void onBubbleBarLocationUpdated(BubbleBarLocation location) {
+        mBubbleBarLocation = location;
         mNavButtonContainer.setTranslationX(getNavBarTranslationX(location));
     }
 
@@ -1181,6 +1184,7 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
     @Override
     public void onBubbleBarLocationAnimated(BubbleBarLocation location) {
         // TODO(b/346381754) add the teleport animation similarly to the bubble bar
+        mBubbleBarLocation = location;
         mNavButtonContainer.setTranslationX(getNavBarTranslationX(location));
     }
 
@@ -1221,9 +1225,12 @@ public class NavbarButtonsViewController implements TaskbarControllers.LoggableT
     public void onTaskbarLayoutChange() {
         if (com.android.wm.shell.Flags.enableBubbleBarInPersistentTaskBar()
                 && mControllers.bubbleControllers.isPresent()) {
-            BubbleBarLocation bubblesLocation = mControllers.bubbleControllers.get()
-                    .bubbleBarViewController.getBubbleBarLocation();
-            onBubbleBarLocationUpdated(bubblesLocation);
+            if (mBubbleBarLocation == null) {
+                // only set bubble bar location if it was not set before, e.g. at device boot
+                mBubbleBarLocation = mControllers.bubbleControllers.get()
+                        .bubbleBarViewController.getBubbleBarLocation();
+            }
+            onBubbleBarLocationUpdated(mBubbleBarLocation);
         }
     }