QS: Make it possible to show smaller tiles (1/2)

* Remove text and show more tiles on one row

Change-Id: I03c2f0ba9d58a93f5100dad35c9359f2ce866312
ps18: set icon margin based on density of device
ps19: adjust the margin
ps20: implement show text under the tiles
ps21: fix typo
ps22: underp
QS: smaller tiles: Fix the text labels on small screen devices

The text labels are broken if the density is smaller than xhdpi

Change-Id: Ie9859a9d8d539249de1584953f28ac56256ef35c