Fixed clicking when directly touching a bookend and progress threshold

comparison.

The slider tracker is now not called to execute haptics when a bookend
is directly selected by touch. This was an unintended behavior.
Moreover, the comparison to determine if a change in slider progress is
beyond the jump threshold was improved to accomodate for floating point
precision error. Impacted tests were also fixed.

Test: atest SeekableSliderTrackerTest
Bug: 295932558
Change-Id: I75237967d69f61dd00c41ae1587680873cf0fd97