Enable onepointfivetap-and-swipe to select.

The goal of this new feature is to enable users to select
text without having to go through the cumbersome context
menu.  Now users can simply execute a
onepointfivetap-and-swipe gesture to select text.
Onepointfivetap is similar to doubletap gesture (where a
finger goes down, up, down, up, in a short time period),
except in the onepointfive tap, a users finger only needs
to go down, up, down in a short time period.

I don't think this change should cause any waves, because
this interaction is consistent with the select interaction
using  a computer-mouse and computer-screen, and i've
checked and it seems to be implemented on other touch-based
phones as well.

Change-Id: Iba84f7316a647e963ba7c57ca608bfdc3bb438b8