Support of restart process of non-top visible activity

Since the method restartTaskActivityProcessIfVisible is added,
restartProcessIfVisible may not only be called for the top
activity. Then if the current top finishes itself, there may be
a timing that the restarting state is changed by resuming next.
That will break the restart procedure when receiving onStop
completion of the target app.

By checking if the activity is scheduled to be restarted, the
restarting state can be recovered and continue the procedure.

Fix: 259042920
Test: SizeCompatTests#testRestartProcessIfVisible
Change-Id: Idb5833480e7f029c9da3c3ea6e4d9df911df5a0c