Shared touch and drag slops for quick step changes with density (1/3)

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: If593568404c00bc1fbccd8a31379bb5fd03beefd
3 files changed