Don't launch ResolverActivity in home stack

Otherwise if the foreground is standard type activity, when finishing
ResolverActivity without choosing to use which home, the current home
is still brought to front.

Bug: 131589476
Test: atest RootActivityContainerTests#testStartResolverActivityForHome
Change-Id: Idca08856de489bd62c90bc75ed37d5a379ae74ce