fixes for unpackaged

[bpulliam]

Description

Use precompiler to branch based on the desired packaging (or non-packaging). Remove APIs that are not available in unpackaged apps. Move to standard of if UNPACKAGED (as opposed to if !UNPACKAGED where possible) as it was confusing looking at both.

Motivation and Context

Improve support for unpackaged apps. Improve readability.

How Has This Been Tested?

Manual build and testing

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)