Merge "Remove the `at` parameter from send_dg and send_vc" am: 58bb30cc am: 8f020f14 am: 766e5274 am: 88868f41

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2486336



Change-Id: I8b2f248b310331647e617537236d52cdc44e3688
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>