WifiMigration: Add test for the config store APIs

This only tests that the API does exist, there isn't any other
feasible tests for this API surface.

Bug: 150973073
Test: atest android.net.wifi.cts.WifiMigrationTest
Change-Id: I094e716027a6eb0995b6c20ed351ee12b91fce85
1 file changed
tree: a05837be932a77935c477a9cfb67b1d05a35604b
  1. tests/