Previously we only auto enable factory system trust agents when the devices is booted for the first time. This change added logic to detect newly installed/enabled trust agents, and enable them if appropriate. Fixes: b/243705470 Test: atest FrameworksMockingServicesTests:TrustManagerServiceTest Change-Id: I3c345a44cfcfccc6f7e2507ba37e378b6b16bd98