Move Wifi/P2p service components under services

Some methods need to be public, since frameworks/base complies before
frameworks/base/services; and services takes build dependency on base.

Similar issue exists with WifiEnterpriseConfig constants.

Bug: 9907308
Change-Id: Ied0e3dee0b25c939067dbc66867a9814b3b3b68e
24 files changed