Preferences: Move huge paragraph description to own item

In some languages, this doesn't fit well into the switch
preference. This huge wall of text also looks pretty bad
when it shares a row with the switch itself. On its own
row, this fits quite nicely.

Change-Id: I0b35d84965a800e578d3557bfc522f34aabb79f0
(cherry picked from commit b8aa362e)
(cherry picked from commit 84f1c2f4)