Add IpConfigurationTest for new @SystemApi

Add new cts for @SystemApi in IpConfiguration.

Bug: 139268426
Bug: 135998869
Test: atest android.net.cts.IpConfigurationTest
Change-Id: I942791abbdccc10d0e2a0018339a2ee4f74c7645
Merged-In: I942791abbdccc10d0e2a0018339a2ee4f74c7645
(cherry picked from aosp/1171795)
1 file changed
tree: f7ef3455a74a0d0d9fe38fccbafbbb9e16189ff8
  1. tests/