Refactor common value extraction

This change pulled the common value extraction functionality out into
its own structure that can be used to extract common values from
multiple sets of properties.

Precursor to follow up changes that will allow properties to contain
embedded structures making it easier to share functionality across
sdk member types.

Bug: 142935992
Bug: 153306490
Test: m nothing
Merged-In: Ic902ed61e40ced7a2c2fa4b5f793f532c6fc0034
Change-Id: Ic902ed61e40ced7a2c2fa4b5f793f532c6fc0034