Attempt to fix ANR's

There seems to be some cases where we change the app visibility
but somehow we miss setting the client visiblity. This usually
shouldn't happen: Client visibility gets set to visible already
in AppWindowContainerController.setVisibility if the token is
hidden or the activity is stopped. However, there seems to be some
edge case where we don't update the client visibility to true.

We started observing monkey ANR's with
I8deb6a97ca1c3d8f4a70a6e045f45a6bc16604bb, but the idea of that CL
was to only change the behavior when becoming invisible, i.e.
defer client visibility until animation is done. This CL reverts
the opposite path back to the original behavior when becoming
visible, most probably fixing the client visibility / AWT.mHidden
inconsistency.

I'm not entirely sure why missing setting client visibility has
caused ANR's, but seems likely given the ANR message:

"Input dispatching timed out (Waiting because no window has focus
but there is a focused application that may eventually add a
window when it finishes starting up.)"

And the client visibility / AWT.mHidden inconsistency is observed
in the window manager dump during every single ANR.

Test: go/wm-smoke
Test: Hope for the best
Change-Id: Ie0c51fa5f3347ba1a2a4652188265d8fb69e6e11
Fixes: 72160186