Pull Request Template

Description

Merged JSSDK feature branch changes
Resolve conflicts and make sure it works for both legacy and OnePlayer
Did end to end testing with legacy player
Did end to end testing regarding the case that users don't have an up-to-date published app

[x] The code change is covered by unit tests. I have added tests that prove my fix is effective or that my feature works
[x] I have performed end-to-end test locally.
[x] New and existing unit tests pass locally with my changes
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation
[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

Package	Line Rate	Branch Rate	Complexity	Health
Microsoft.PowerApps.TestEngine	94%	90%	779	✔
Summary	94% (2107 / 2251)	90% (478 / 530)	779	✔