Replace spacing near scroll views with overscroll (COMMUNTIY) (#2884)

* Remove space below scrollers and add overscroll in app info screens

Note that this changes the total padding of the content in the debuglog
fragment from 20dp to 24dp for consistency within the layout.

* Remove spacing below scroll view and add overscroll to stats explanation

* Fix scrollbars

* Fix contact diary (edit places & locations) scroll behavior

* Remove space below scrollers and add overscroll in settings screens

* Undo changes to PPA more info fragment

This partially reverts commit 85e4650e12e27999a01a293695121cd324a7123f
to avoid conflicts with #2945.

* Fix Check In onboarding

Also changes margin of button to match that of contact journal
onboarding

* Uniform bottom paddings

Co-authored-by: harambasicluka <64483219+harambasicluka@users.noreply.github.com>