commit d44de5a6245e82a0ca6a216958d22d7fc0f6a70b
author Lorenzo Colitti <lorenzo@google.com> Wed Mar 18 11:42:25 2020 +0900
committer Lorenzo Colitti <lorenzo@google.com> Thu Mar 19 22:35:28 2020 +0900
tree 7e922f8051dd6546f90d0c565ff2e2d779e5c67e
parent 2a17338e444440310f64a67ea191f01daea1f37e

Release the interface request when Ethernet tethering is stopped.

When the Ethernet interface becomes unavailable (e.g., because
the cable was unplugged or the interface was removed), or when
setEthernetTethering(false) is called, release the Ethernet
interface request.

This ensures that:
- The Ethernet interface immediately becomes available for use in
  client mode.
- If an interface later becomes available, tethering is not
  automatically started. This is consistent with what happens for
  other downstream types such as wifi and USB. Evey time one of
  those downstreams goes down, tethering is stopped and will not
  be restarted.

Test: manual
Bug: 148824036
Change-Id: Iaf85e800569f2e08c39f7ebb96f8aa34f6e53133