Make sure dormant mode is properly dealt with once Tor Browser for Android is using 0.4.x
We should double-check that, once we deploy 0.4.x on mobile, the dormant feature is not a problem for mobile users. Depending on where we get 0.4.x from (built ourselves or from the Guardian Project) we might need to write a patch that does something similar as legacy/trac#29045 (moved).