Do not verify client app uid and package when stopping the sandbox

The sandbox could be stopped after the app process was killed from an
uninstall. The check that verifies that a client app uid belongs to a
given package name could fail if app was being uninstalled. Remove the
check when stopping the sandbox.

Bug: 272046491
Test: Run sdksandbox tests
Change-Id: I6b25344cd02454c19ffa0beeff18bda02041a1af