1. If screen magnification is enabled the user has to triple tap
and lift or triple tap and hold to engage magnification. Hence,
we delay the touch events until we are sure that it is no longer
possible for the user to perform a multi-tap to engage
magnification. While such a delay is unavoidable it feels a
bit longer than it should be. This change reduces the delay
between taps to be considered a multi-tap, essentially making
the click delay shorter.
bug:7139918
Change-Id: I2100945171fff99600766193f0effdaef1f1db8f
86fe9e14f1