[EC-1045] add vault timeout action to policy (#2372)

* [EC-1045] lock action if policy and show message

* [EC-1045] add text for policy message

* [EC-1045] add consts to policy service

* [EC-1045] missed a const

* [AC-1045] fix build

src/Core/Abstractions/IPolicyService.cs

@@ -20,6 +20,7 @@ namespace Bit.Core.Abstractions
             string orgId);
         Task<bool> PolicyAppliesToUser(PolicyType policyType, Func<Policy, bool> policyFilter = null, string userId = null);
         int? GetPolicyInt(Policy policy, string key);
+        string GetPolicyString(Policy policy, string key);
         Task<bool> ShouldShowVaultFilterAsync();
     }
 }