Remove invocation of closeTransaction while using a11y service

The operation applies to a local transaction, so it should not
touch the global transaction.

Bug: 143734779
Test atest AccessibilityWindowManagerTest#
           setAccessibilityWindowIdToSurfaceMetadata
Test: Enable accessibility service (e.g. TalkBack) and check logcat
      shouldn't have "Call to SurfaceControl.closeTransaction without
      matching openTransaction".

Change-Id: I5a2879656471c85f91931e385e4873b4499ed977