[BR03.2] Implement NetworkStack is-uid-networking-blocked shell command

This is needed to test CM#isUidNetworkingBlocked
API from CTS. Because CTS does not have enough permission to
access bpf maps.

This change also uses framework-connectivity.stubs.module_lib
instead of framework-connectivity to use not-yet-released connectivity
APIs.

Test: adb shell cmd network_stack is-uid-networking-blocked <uid> <metered>
Bug: 297836825
Change-Id: Ie01ab68be79d2b98fc1b037dd0971368cdb247cb
2 files changed