wifi: jarjar network stack AIDL interfaces

This was the last set of wifi dependencies that were
not jarjar'ed.

Bug: 153596226
Test: Device boots up and connects to wifi networks
Test: Both the commands below return empty list:
a) dexdump service-wifi.jar | grep 'Class descriptor' |
grep -v -e "com/android/server/wifi" -e "com/android/wifi/x/"
b) dexdump framework-wifi.jar | grep 'Class descriptor' |
grep -v -e "android/net/wifi" -e "com/android/wifi/x/"

Change-Id: Ib214b130a740c1840890d5183ab8be594d3af7c8