Shared touch and drag slops for quick step changes with density (2/3)

All shared touch and drag slops are not static anymore but are computed
for the current system density if the user were to switch density of
device.

Test: change density and use quick scrub
Fixes: 78244075
Change-Id: Idc35e78bdd9c6d9b31a1ccbdd9cd0e7fec87185f