OK, what do you think is more effective?
Just having humans searching everything. They would probably be doing that anyway since dogs are not very reliable (not because of inability to use their sense of smell to detect it, but because they are dogs.).
Police don't need to get dogs 'accepted.' They're already accepted. I don't even know what you're thinking here.
Dogs sniffing for hidden electronics is not a commonly accepted practice, and I suspect that this is probably part of a campaign to make it one.