Move upstream interface BPF support check to BpfCoordinator

Removed upstream interface BPF support check from IpServer and moved
it to BpfCoordinator. The support check can be performed directly in
BpfCoordinator using the interface name.

Test: atest TetheringTests
Bug: 294025403
Change-Id: Ia51bc3ab18dd21afdca9db9199fa060aab68f768
4 files changed