Test: Clean up some hard-coded flags in resolv_integaration_test am: 6491342a am: 8e1845c8 am: 41a0fc4f am: a463fedd am: e21c3f9f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2465150



Change-Id: Ia12733935decd424dead211c7afbfb306c13c0c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>