Revert "Cleanup the IP_REACHABILITY_MCAST_RESOLICIT_VERSION experiment flag."

This reverts commit 354928af2bc3a8bb094551dd76f3c096fb9772de.

Reason for revert: we still need this flag to do a flag push from g3 to disable the mcast_resolicit flag, in order to prevent NUD failures due to MAC address change.

Test: TH
Change-Id: I865deca2b6c8cc507b9d2efb68754b75123a34ea
4 files changed