Merge "Consolidate DNS label comparison functions in DnsUtils" into main am: 880807031f am: cc3d5369b8

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/3175899

Change-Id: I11865133a12b9ff2081bfcd10c704221a92fdf37
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>