wifi: upgrade wifi interface to 1.5

Only a root interface is added and update relevant code.

Bug: 160834354
Test: atest VtsHalWifiV1_0TargetTest VtsHalWifiNanV1_0TargetTest VtsHalWifiApV1_0TargetTest \
            VtsHalWifiV1_1TargetTest \
            VtsHalWifiV1_2TargetTest VtsHalWifiNanV1_2TargetTest \
            VtsHalWifiV1_3TargetTest \
            VtsHalWifiApV1_4TargetTest VtsHalWifiNanV1_4TargetTest VtsHalWifiRttV1_4TargetTest
Change-Id: Ifdffa3a6996eca1d3c4b499258896cdfe5eb9c87