Add tooltip to check translation source language

[andrewtavis]

Terms

• I have searched open and closed feature requests
• I agree to follow Scribe-Android's Code of Conduct

Description

This issue would implement the translation source language tooltip for the application. The designs for the tooltip are available on Figma here. The change language button should navigate the user to the translation source setting in the settings for the given keyboard.

Contribution

@catreedle will work on this as a part of Outreachy :) Happy to support and review!

[andrewtavis]

Closed by #517 🚀 Thanks for the great work here, @catreedle!