Programmatically (de)activate the drawer

[RoRoche]

I'd like to programmatically (de)activate the debug drawer, for example by turning a switch "debug mode" in settings.

A solution may be to add 2 methods in DebugDrawer: enable() and disable(), to respond to dynamic changes.

Moreover, the DebugDrawer.Builder::build() could receive a boolean parameter to enable or not the drawer while building it (true by default to be compatible with current behavior).