Decrease fling sensitivity for vertical falsing.

This CL should reduce falsing for vertical swipes (quick settings
especially) by increasing the required travel distance and decreasing
the fling sensitivity for vertical swipes on the lock screen.

Manual testing with folks around the office show minimal actual
impact, but smaller, quick swipes are now rejected.

Bug: 148084465
Test: atest SystemUITests
Change-Id: Ie984765bd070696e4f1c471343824a7cb9fe63f6