Allow scrolling folders in when all apps is disabled.

Allows for more items to be added into a folder.
Allows for scrolling by letting the content area inside the scroll view to be taller.
The height of content area was capped in https://googleplex-android-review.git.corp.google.com/#/c/387583/

Change-Id: I8d7950ac9c155e26c5a299c17ae6a2bbf829dce6