The value specified on the @ChangeTrackingPolicy annotation does not get converted to it's constant counterpart.
@ChangeTrackingPolicy("NOTIFY") is stored on the ClassMetadataInfo class as the string value "NOTIFY" and not converted to ClassMetadataInfo::CHANGETRACKING_NOTIFY. Passing an integer value works as expected.
This means all ClassMetadataInfo#isChangeTracking* methods return false. I've attached the patch I'm currently using based off r7404.