Fixed and decreased isAtEquilibrium thresholds

Distance and speed were multiplied by LINEAR_STRETCH_INTENSITY which is
not directly related to speed and and distance. Moreover the velocity
threshold was a little bit high (1/0.016, wich means 62 pixels/second)
and the distance as well (1 is ok if there's no scale but since there's
some stretching the difference was being magnified).

Bug: 184892316
Test: EdgeEffectTests and visual
Change-Id: Ibd7adb16d1d00df0ab6e96132bfe96a4fa4d45dc