Fix overriding ip configurtion with default one

EthernetConfigStore should return 'null' for default interface if the
default interface hasn't been configured otherwise it would be hard to
distinguish not-configured vs configured with default values.

Bug: 79415136
Test: verified w/o .xml overlay Ethernet continues to work
Test: verified that ip config from overlay is not getting overriden
Change-Id: I4eb914923f3664b12b6af0ae05f45b60c5312b02
1 file changed
tree: f288420777cf56f8b73665c51e30750d3a0989ef
  1. service-t/
  2. Android.mk