Re-enable screenshot testing

[HonzaR]

Is your feature request related to a problem? Please describe.

As part of the implementation in #1447 we've been required to switch from ComponentActivity to AppCompatActivity, which makes us unable to call

@get:Rule
val composeTestRule = createAndroidComposeRule(MainActivity::class.java)

in the ScreenshotTest logic. We've filed it in the Google Issue Tracker ticket.

Describe the solution you'd like

Bypass such limitation somehow, or rework our Screenshot testing approach, e.g. as filed in this ticket #864.

Alternatives you've considered

Additional context