Revert "Remove Msapp Conversion code (#156)"

[NavneetThekkumpat]

This reverts commit caf24f3c23f03db057d78a2c7091ff69a3d2dd73.

Pull Request Template

Description

Reverting the changes https://github.com/microsoft/PowerApps-TestEngine/pull/156

Checklist

• [x] I have performed end-to-end test locally.
• [x] My changes generate no new warnings
• [x] I used clear names for everything
• [x] I have performed a self-review of my own code

[github-actions[bot]]

Package	Line Rate	Branch Rate	Complexity	Health
Microsoft.PowerApps.TestEngine	94%	91%	830	✔
Summary	94% (2209 / 2344)	91% (527 / 578)	830	✔

Minimum allowed line rate is 50%