Only nominate untrusted network when allowed

Only nominate untrused network when request untrusted network.

Bug: 151150610
Test: atest com.android.server.wifi
Change-Id: Ida48214a63c39539e47a1ab0984c2721f644b0ff
2 files changed
tree: 643b5c24dbda40cbc40dede2d1c53cf76cdbc5c5
  1. apex/
  2. service/
  3. PREUPLOAD.cfg