Update service injections to use lowermost class, permitting further downstream extensions of SDC

Problem/Motivation

A couple of service injections need to be updated to typehint on the core class, not the one UI Patterns implements that extends the core class. Without this, its not possible for other downstream projects (such as mine), to further decorate core's class, because when UI Suite is used, it will crash because my class extends cores, not myclass -> uisuite -> core.

Steps to reproduce

• Create a new class that decorates SDC service plugin.manager.sdc.
• Extend core class.
• Visit relevant UI Patterns/suite routes.
• WSOD

Proposed resolution

Change the imported class to the root-most core class.

Usually in Drupalland we'd use an interface, and thats probably lead to this oversight.

Remaining tasks

Nil.

User interface changes

Nil.

API changes

Nil.

Data model changes

Nil.