Fix not animating icons

When the icon is not animating, we need to move it to the end state. To
do that, we call stop. We also need to call start, as the animator set
may not have been initialized.

Fixes: 257278678
Test: atest QSIconViewImplTest
Test: manual
Change-Id: I356342a185e63efc2e3b8d25b8c57e20e1ad62bc