Fix bouncing of task view when dragged past dismiss threshold.

Before: https://screenshot.googleplex.com/56AHSMFkNwC76BV
After: https://screenshot.googleplex.com/AjuWqZaSNxmNYn8

Other cases after:
https://screenshot.googleplex.com/oaNotdg79v7LGUA
https://screenshot.googleplex.com/8SVtzpokbvmAzpv
https://screenshot.googleplex.com/87uRqmEAasBMQz2

Fix: 319577620
Flag: NA
Test: Manual (animation), analyse setPlayFraction log - see screenshots
Change-Id: Ib1f24182b8fc0f6ea1ff07125f25dbfc206ae5c2