Avoid showing the scanning animation when face auth succeeds

Passing in true is not required as the passed in boolean is only used to determine whether we want to show the scanning animation or not.

Fixes: 311715007
Flag: NONE
Test: everything builds
Test: manually, trigger face auth and unlock the phone successfully, see that the success animation is shown.
Change-Id: Ic1de042d22ff9da5e07d38eea610f7b5b6cde12f