Send tethered interface callbacks based on interface existence.
Currently, callbacks for tethered interface availability are sent
based on interface link state. This is incorrect:
- It is acceptable and expected to be able to enable tethering on
an interface that does not yet have link up.
- It doesn't seem useful to disable Ethernet tethering if link
temporarily goes down.
Instead, only base the callbacks on whether an interface exists
Test: WIP tests in aosp/1260100 pass
1 file changed