Add INTERFACE_INCLUDE_DIRECTORIES to serialization_lib CMakeLists.txt

- Jira ticket: MLTOSA-813
- Update CMakeLists.txt to make it compatible with tools like
  FetchContent.

Signed-off-by: Justin Ngo <justin.ngo@arm.com>
Change-Id: I22f6bf4df3f3860115fd77b1cc66b2d71bcef2ad