Remove MockVpn.setAlwaysOnPackage() non-lockdown.

Remove calls to MockVpn.setAlwaysOnPackage() where lockdown is
false as this does not cause any changes to occur. Also verify
setRequireVpnForUids() is not called for this case in VpnTest.

Bug: 230548427
Test: atest FrameworksNetTests
Change-Id: I3428e8b31b02975975be9e943e1f88cf0e80c5ee
2 files changed