Bring back the mapping of touch IDs to fix flinging

This logic was removed in 3a30ed4e


but was still needed by the velocity tracker used for fling gestures.

Also disable swipe gestures in the gesture config since they have
unwanted side-effects on the gesture detection and we don't use them.

Change-Id: Icbb44a4c27e2cd243d631484d03a956e9dce64dc
Reviewed-by: Andras Becsi <andras.becsi@digia.com>