[IPPInAppFeedback] Add Unit Tests

[iamgabrielma]

From review: #8549 (review)

Consider adding tests for this logic too: it could help you work faster on it, even though this is a temporary addition to the app.

[iamgabrielma]

Added along each PR that needed testing, mostly #8681 , #8657 , and #8730 . Closing.