Revert^3 "Register IpClient as OffloadEngine when APF supports mDNS offload"

This reverts commit 3a8340a7cef280cc51844423f19c8053aa9a0219.

Reason for revert: based on design review feedback go/nsdmgr-hardware-offloading. OffloadEngine logic should be moved into ApfFilter.

Change-Id: I7beb6c4d43c4b63183e2746cd0fa86b28770b319
4 files changed