Revert "keystore: Allow network_stack uid to use AID_WIFI"

This reverts commit 286c4b053266d77f94fda03320fd2c93ceb20125.

Reason for revert: Wifi services no longer plan to be a separate
APK/process for mainline. Will instead become a jar loaded from Apex.

Bug: 144722612
Change-Id: Ie6c8265f36cd358a87e88e293158df01d262d8cc
Test: Device boots up & connects to wifi networks
1 file changed