Add haptic effect for the seekbar in Settings 3/n.

- in Pointer speed, perform haptic feedback as the seekbar's progress value is updated.
- screenshot, https://screenshot.googleplex.com/997TwHNc4TJtsG7

Bug: 174109628
Test: make -j42 RunSettingsRoboTests ROBOTEST_FILTER=PointerSpeedPreferenceTest
Change-Id: I385f290ae8ca39944eaeb054298db45da6acab4c