Implement Enrollment-Specific ID

Implement Enrollment-Specific ID, which is calculated using fixed device
identifiers, as well as the provisioning package and the Organization
Identifier set by the Device Policy Controller.

Test: atest FrameworksServicesTests:EnterpriseSpecificIdCalculatorTest
Test: atest com.android.cts.devicepolicy.MixedDeviceOwnerTest#testEnrollmentSpecificIdCorrectCalculation com.android.cts.devicepolicy.MixedManagedProfileOwnerTest#testEnrollmentSpecificIdCorrectCalculation com.android.cts.devicepolicy.MixedDeviceOwnerTest#testEnrollmentSpecificIdEmptyAndMultipleSet com.android.cts.devicepolicy.MixedManagedProfileOwnerTest#testEnrollmentSpecificIdEmptyAndMultipleSet
Bug: 168627890
Change-Id: I8b24efa6b8c82d6181f2b20bc8880ddeb6caa4c5