Disable deprecated declarations warning-to-error for test.

networkCreatePhysical and networkCreateVpn were deprecated since v6. To
minimize change in S release, DNS resolver test will not migrate to new
method networkCreate.

Bug: 171872481
Test: atest
Original-Change: https://android-review.googlesource.com/1743414
Merged-In: Ic4a755f9f86f83a2f8be0427b4d39fcec6bf05de
Change-Id: Ic4a755f9f86f83a2f8be0427b4d39fcec6bf05de