Perform MOBIKE when data stall is suspected

Trigger MOBIKE when data stall happens in VPN network.

VPN tunnels may break as a result of the NAT mapping expiring,
which may be able to be corrected via a MOBIKE event.

Bug: 238692379
Test: atest FrameworksNetTests
Change-Id: I3f677e6b65146af67a286d6d654f30b06134d31d
1 file changed