Add two more methods to the computer

Bug: 180109780

Direct two methods to the snapshot computer:
 * queryIntentActivitiesInternal()
 * queryIntentServicesInternal()

This effectively makes these two methods lock-free:
 * queryIntentActivities()
 * queryIntentServices()

Test: atest
 * FrameworksServicesTests:AppsFilterTest
 * FrameworksServicesTests:PackageInstallerSessionTest
 * FrameworksServicesTests:PackageManagerServiceTest
 * FrameworksServicesTests:PackageManagerSettingsTests
 * FrameworksServicesTests:ScanTests
 * FrameworksServicesTests:UserSystemPackageInstallerTest
 * PackageManagerServiceBootTest
 * UserLifecycleTests#startUser
 * UserLifecycleTests#stopUser
 * UserLifecycleTests#switchUser
 * android.appsecurity.cts.EphemeralTest
 * android.appsecurity.cts.InstantAppUserTest

Change-Id: I3fb320ba5fb1944c256a08f6017e7a78a0034d90