Wifi details - handle no profile owner

* If there is no profile owner, then do
  no call DPM method getProfileOwnerAsUser

Bug: 158284193
Test: manual testing
      make RunSettingsRoboTests -j ROBOTEST_FILTER=WifiDetailPreferenceController2Test
Change-Id: Ief1f0b3aa6805d69fc14da8f87a90c9b12bef8c6
1 file changed