Match pid to check if package has been stopped

Check for change in pid instead of pid presence to confirm
if app had actually stopped with am stop-app cmd.

Bug: 238347465

Test: testSetUserControlDisabledPackages_singleUser_reboot_verifyPackageNotFgsStopped
Change-Id: I9bfeada582033e8f203ccb8e619b5b6c949595ca
2 files changed