Low ram devices recents list is throwable

On a low ram device, the recents list can be thrown when flinging. It
can skip more tasks in the list when flinged harder.

Change-Id: Ie21309f97178b79121d4edc42541f45b13cf5931
Fixes: 64584893
Bug: 62251652
Test: manual - use low end device to go recents with items and fling