Add CDM system api to check for association presence

Per agreement with wifi team, wifi stack will call into CDM when wifi
connection is requested, treating CDM record similarly to the previously
approved networks records, i.e. skipping UI when association exists.

Test: atest android.os.cts.CompanionDeviceManagerTest
Fixes: 143572863
Change-Id: I28b44076e594fb9357b5a543176d285414ef06f8