Marking event handler passive

[martinrisseeuw]

mapbox-gl-js version:

Steps to Trigger Behavior

1. Get a android device or simulator
2. Browse to http://secrid.martinr.nl/stores/
3. Type a location to flyTo in the geocoder field
4. Select the location by clicking (touching it)
5. Map starts to fly but stops before reaching the location

Expected Behavior

FlyTo the select location without stopping before

Actual Behavior

When you select a location through the geocoder the map stops when you press one of the items in the list. My simulator returns this warning:
Handling of 'touchmove' input event was delayed for 164 ms due to main thread being busy. Consider marking event handler as 'passive' to make the page more responsive.

When you use enter instead of pressing the selection the behaviour works as expected.

[lucaswoj]

Duplicate of #3720