Only activate the wifi alternate reality hack for KK and lower

Currently, the hack is activated for apps that target L or lower.
Per discussion, we should activate the hack only for apps that
target KK or lower. Apps that target L or above must instead use
the appropriate multinetwork APIs to deal with this situation.

Bug: 20081183
Change-Id: I29e1989e7a07aaabc10f604c20ecdc0d8b5366a3