FlaUI and TestStack.White interoperability

[dsheehan]

• Reworks UIAComWrapper to depend on UIAutomation-Interop, removing the internally bundled dll.
• Allows interoperability of TestStack.White and FlaUI within the same project (AppDomain).
• Allows for gradual transition, where a full-migration was not economically feasible in a single-shot
• A prior PoC using FlaUI.Adapter.White proved to be unusable, given the complex workarounds we had already made in our project for limitations in TestStack.White. Simpler projects may not run into the same issues.
• No effort has (intentionally) been made to cleanup code in order to minimize future fork rebase efforts, bare minimum to build and achieve interop.
• Package name kept as UIAComWrapper to allow for drop in replacement, and trying to mitigate issues with signing, without forking/rebuilding TestStack.White
• Example usage of interop can be seen in branch InteropPoC / Program.cs