[automerger skipped] Remove DNS64 detection code from clatd. am: c29e1785c1 am: 66ce03833b -s ours

am skip reason: Change-Id I892f364d6cbfe76277686387e35c04d3d6eb5ecc with SHA-1 c29e1785c1 is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/android-clat/+/11704600

Change-Id: Id4252e4ecfde84c713700d37759972178bb159f6