[Code Health] Fix misc-const-correctness build warning am: 50746ee1 am:...

[Code Health] Fix misc-const-correctness build warning am: 50746ee1 am: 86fed968 am: 73557dca am: dc136e9e

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



Change-Id: I3d1aadbac72eee7b130008623eee6c57690fb64f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>