Fix bubble position when dragged to dismiss view

When moving a bubble to dismiss view, use the drag translation x methods
to set the translation x values.
When bubble is moved to the dismiss view, the container will animate
back to the initial position. And we need to account for this while
bubble is in the dismiss view.

Bug: 339659499
Flag: com.android.wm.shell.enable_bubble_bar
Test: manual, drag bubble to other side and then to dismiss view,
  observe that bar moves back to original side and bubble is at the
  center of the dismiss view
Change-Id: I4c6e1be2dcd1180d985ceafccfc0f18466549347