VPN configurations in T should automatically include the corresponding
SDK sandbox UID of an application.
The existing tests used a UID range outside the regular application
range, which means the new sandbox UIDs wouldn't be tested. Modified the
UIDs to run in the regular UID range of [10000, 19999]. Changed the
tests to include the SDK sandbox UID where necessary.
Also, changed the entire class to only run on T+, since that is the only
place where the SDK sandbox UIDs will be added. Since VPN code is not
mainline updatable, having coverage on earlier releases doesn't really
help anyway.
Finally, fixed up testNetworkBlockedStatusAlwaysOnVpn() in
ConnectivityServiceTest to include the sandbox UIDs as well.
Bug: 225317905
Test: atest VpnTest
Test: atest ConnectivityServiceTest
Change-Id: I83009344c270e520ac8ad1558c067cf7e46b1d2e
021d8b08c1