Wait for the ACTION_FINISHED broadcast before finishing the Activity.
This prevents the Setup Wizard from being re-launched when it is still
set as the default home screen, which it continues to be until the
exit worker changes as part of its finishSetupWizard call.
Skip SetupWizardExitActivity during the normal finish process, moving
common exit operations to SetupWizardUtils.
Change-Id: I1c59553e7dcaf934fb81dce9bf901ec0f2bb7b59
63bbec0258