Test: Replace wait_until() with wait_for() am: 18f4d9eb am: fc8e8e8d am: 867406f0

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2825794



Change-Id: I815083a08f002c258e26929b895552f0f6406117
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>