Fix hasEnabledAutofillServices() return wrong value after AutofillServie updated

AutofillManagerService tries to get service impl from the cache, but
the service impl will be deleted from the cache after service is
updated. The service enabled status should not be affect after
updating service. If AutofillManagerService cannot get the service
from the cache, we will get the service instance for an user.

Bug: 152473957
Test: atest CtsAutoFillServiceTestCases
Test: Manual. Install sample app and make sure the value is correct
after update

Change-Id: I0f2c156ccced8c87e0df5b2f9266acfd769a7322