When Worksource of the interfeace is WIFI_UID, return empty packge set

For opportunistic Aware attach, WorkSource will be WIFI_UID and consider
as the lowest priority. Return empty package set in this case.

Bug: 267683996
Test: atest com.android.server.wifi
Change-Id: I2d89b0b7813e3e6faf3a2ccfa3385fd39872c669
3 files changed