Fixing overscroll getting lost due to float point comparision

When swipping back from overscroll, deltaX becomes close-to-0
causing the equality check (deltaX != 0) to fail. This
causes the overscroll to jump.
Platform views like HorizontalScrollView use int instead of
float to avoid this.

Bug: 273828110
Test: Verified on device that the overscroll finishes smoothly
Flag: N/A
Change-Id: I140750a2bdc39cebcbeb8ea83bb38efb0449dd5a