Add actions to outer CommunalTouchableSurface.

The glanceable hub sits within an outermost container, whose purpose is
to capture touch events, such as press and hold. This container
previously was part of the selection traversal, but did not expose any
actions of its own. To remedy this, the container was hidden from
accessibility. However, this introduced a regression with HSV where
the child elements were no longer traversed and did not appear in the
hierarchy.

To remedy this issue, this changelist makes the outer container once
again visible to accessibility and now surfaces the same actions as the
glanceable hub container (closing the hub and editing widgets). While
this does lead to some action redundancy, the actions do logically map
to this space.

Test: manual - ensured actions are present and hsv can read the
      hierarchy.
Flag: EXEMPT bugfix
Fixes: 385973993
Change-Id: I054e64c2406029f5b2ab21893bf4d0a959638e58