Split DevicePolicyManagerInternal into DevicePolicyManagerLiteInternal.

DevicePolicyManagerInternal is not set when the device doesn't have
the device_admin feature, but some methods are still needed in that
scenario (like notifyUnsafeOperationStateChanged() on automotive).

Fixes: 190395562

Test: manual verification
Test: atest FrameworksServicesTests:DevicePolicyManagerTest FrameworksServicesTests:DevicePolicyManagerServiceMigrationTest

Change-Id: I48271b828ff01c4e4f3e0365410a7a745f1b0a1d