Replace footer with regular preference

Replaced the "Manage Storage" footer preference
with a regular preference because the footer type
is not meant to be a touch target. This should fix
the bug with not being able to click on specific
parts of the preference.

Test: run settings espresso tests
Bug: 34349518
Change-Id: I36ada2a6a537a68d9fcbe7e10773896225ecc6b2