m8: increase ui responsiveness

* lower touchslop, improves scroll response
* speed up the notification shade

Change-Id: I0262a5b359d4298a44bf8211baca13e01fa59535
m8: Remove composition property

Change-Id: Icb3495d67154eb8124b0b7945975e27ae7414f5c
Merge branch 'kitkat' of https://github.com/task650/device_htc_m8 into kitkat