Add divider line below "see all apps" preference

- and increase the tile limit by 1 to accomodate the divider.

Change-Id: I94cbf47fd987a6ff4c4fabcc3124fae1f0438876
Fix: 63906012
Test: make RunSettingsRoboTests
(cherry picked from commit 6cd558e595a1d7cb6912b9c2cc1fb8e9e5267ecc)
4 files changed