This patch updates the ResetCredentialsPreferenceController to check the
WIFI keystore namespace if called by the primary user.
Test: Install a WIFI certificate or key and watch the
"Clear credentials" button become enabled in the credential
storage dialog of Settings.
Bug: 189601008
Change-Id: I69828b64a7e3c707c27b4582d64ff0ddb863a4ff
Having consistent import order will reduce chance of merge
conflict between internal and external master
Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b
