Add wifi_add_or_remove_virtual_intf() to the legacy wifi hal

This is used to implement add/remove virtual interfaces for legacy
wifi drivers at runtime.

Issue: FP2P-100
Change-Id: I5e95fcc350b2e000dab8843d91423235d4310f03
CRs-Fixed: 2257197
(cherry picked from commit 29550bf66ff636df0f84f9a0eb45d29f8a096fd3)
1 file changed