[jit][edge] Migrate base types to DynamicType on mobile. (#70233)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/70233
Make type parser to produce DynamicType for all base types which don't have type arguments, and return DynamicType pointer for IValue::type().
ghstack-source-id: 146818622
Test Plan: no behavior change.
Reviewed By: iseeyuan
Differential Revision: D33137219
fbshipit-source-id: 1612c924f5619261ebb21359936309b41b2754f5
