Remove State#restored.

The stack itself is the best indicator of if it has been initialized or
not. With a small refactor we can encapsulate the stack modification in
initialization phase to ActionHandlers only.

Hopefully it won't cause other issues in other corner cases.

Credits to Sony Mobile devs on their bug report.

Bug: 34593795
Change-Id: I4c8e5f9816ede8bb335151626c2aedd2bed521cc
(cherry picked from commit 23618f30215a4bfecaa10795e2ba413702c12bbf)