Dynamic Color support

[idnovic]

Please add support for dynamic colors.

https://source.android.com/docs/core/display/dynamic-color

I attached a screenshot.
Left is tasks and right is an other app with support for dynamc colors.

[welcome]

Hello! 👋 Thanks for logging this issue. Please remember we are all volunteers here, so some patience may be required before we can get to the issue. Also remember that the fastest way to get resolution on an issue is to propose a change directly, https://github.com/ankidroid/Anki-Android/wiki/Contributing