[Code Health] Fix misc-const-correctness build warning am: 50746ee1 am: 2606af27 am: d11f6a9e am: 61208c05

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2509035



Change-Id: If7046e2bb4fa503c3d68079b8c1ba1ec58d320b0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>