An action block that waits for the user to choose this block as the system screensaver.
The fiber will pause until this block have been chosen as screensaver.
This block must be followed by a Screensaver created block within the same fiber that signals the setup step complete, and to await the setup of another screensaver, followed by Fork with its NEW path connected to this block, see example flow below.
Note! This is an experimental feature, expect breaking changes. Not for production use. This feature requires Android 4.2+.