Give EthernetTetheringTest the restricted networks permission.

This test fails on devices where physical Ethernet interfaces are
available but marked restricted, like cuttlefish.

Bug: 197462993
Bug: 197910181
Test: test-only change

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/1807157

Change-Id: I04ccf491be12236dffb5ba4972fac35946fc6896
Merged-In: I04ccf491be12236dffb5ba4972fac35946fc6896
Merged-In: I15c991b2e43e2d5e823dcdcfbd74adfd9b2f6f08
1 file changed