Unify timesheets behavior on Android to match iOS

[piotr-iohk]

Some context and discussion here: synonymdev/bitkit-ios#198

This task is to unify behavior of timesheets to meet iOS behavior. In particular that means not to show backup timesheet and highbalance timesheet on balance change. Also to make sure that timesheets queue is the same on both platforms.

[ovitrif]

Fixed in 556

Should land in master when #554 is merged.