Rename StringNetworkSpecifier to Ethernet

To keep the tests passing on Q and R, add a CompatUtil class that will
keep creating StringNetworkSpecifiers (now removed) instead.

Bug: 179329291
Test: atest CtsNetTestCases
(note the merged-in is an unrelated change, just used to avoid the
branch)
Merged-In: I14a7c8ad27ed998f8c905c0b24cd021710081d97

Change-Id: I14c1ac7cee0ec32353b38ebca4ae6c5cd2e25541
2 files changed
tree: eed34c9c3cd050179cc80e4b97acff4c5d86e2ca
  1. staticlibs/