Add Quick Settings Tile for Toggling the Screenshot Block

[DavidBerdik]

It would be cool to add a Quick Settings Tile for toggling the screenshot block.

This ticket is blocked until #5 is done.

Helpful references for implementing the tile:

• https://github.com/DavidBerdik/MACsposed/blob/1.1.5/app/src/main/AndroidManifest.xml#L23-L36
• https://github.com/DavidBerdik/MACsposed/blob/1.1.5/app/src/main/java/com/berdik/macsposed/QuickTile.kt