ConsoleActivity: use non-deprecated constructor for GestureDetector

The non-deprecated version has been available since API 3.

This improves the way sensitivity thresholds are handled, especially
the touchSlop value responsibe for long pressing.

Passing the context allows android to use device specific, density
aware values instead of hardcoded ones.

This makes long pressing less sensitive on high-dpi devices where
it was almost unusable before.