Ensure correct window ordering.

Make sure that moveStackWindowsLocked() is called every time that the
stack ordering changes. This will rebuild the window list. Previously
the call was being made after the moveStack() call which got forgotten
in the addAppToken() causing the home stack to obscure incoming phone
and video calls.

Fixes bug 10023223.
Fixes bug 10678010.
Maybe fixes bug 10858941.

Change-Id: I59922dc979a19210008eac1f528704984c63c886