Set local routes exclusion in the networkAgent

Add a field in the VpnConfig to store local route exclusion
bit from VpnProfile, and set the value into the networkAgent
of VPN network.

Bug: 184750836
Test: atest FrameworksNetTests HostsideVpnTests
Change-Id: I22b9a5990a3dab0418b44ec19d2996ead6529231
2 files changed