Screenshot with gesture breaks the zoom

[kristiyanP]

How to reproduce

• Device with screenshot gesture ( 3 fingers down )
• Activity with a single imageView full screen ( match_parent, match_parent )
• Take screenshot with gesture 3 fingers down ( which will make the Android system to cancel all other touch events handlers )
• After the screenshot try to zoom, it won't work

See gif:
https://media.giphy.com/media/uVtOv7lrj6tpnALUh2/giphy.gif

[imablanco]

Hopefully this will be fixed when #30 is merged.