I need to help to pass account id from the CreateContactreateController.js to the createContact.apxc 

CreateContactreate.cmp

<aura:component controller="CreateContact" implements="flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId" access="global" >
    <aura:attribute name="AccountId" type="String" />
    <aura:attribute name="CreateContact" type="Contact" default="{
                                                                 sObject : 'contact',
                                                                 LastName:'',
                                                                 AccountId:'',
                                                                 Email: '',
                                                                 Phone:''
                                                                 }" />
    <div class="slds-p-bottom_large slds-p-left_large" style="width:500px">
    <lightning:recordEditForm aura:id="recordEditForm"
                              recordId="{!v.recordId}"
                              objectApiName="Contact">
                    <lightning:inputField fieldName="LastName" aura:id="LastName" value="{!v.CreateContact.LastName}" />
                    <lightning:inputField fieldName="AccountId" aura:id="AccountId" value="{!v.CreateContact.AccountId}"/>
                    <lightning:inputField fieldName="Email" aura:id="Email" AccountIdvalue="{!v.CreateContact.Email}"/>
                    <lightning:inputField fieldName="Phone" aura:id="Phone" value="{!v.CreateContact.Phone}"/>
            <lightning:button aura:id="submit" type="submit" label="Save record" onclick="{!c.doSave}" class="slds-m-top_medium" />
        </lightning:recordEditForm>
    </div>
</aura:component>

CreateContactreateController.js
 

({
    doSave : function(component, event, helper) {
        var action = component.get('c.createContact');
        var contc = component.get('v.CreateContact').AccountId;
        console.log('AccountId '+ contc)
        action.setParams({
            con : component.get('v.CreateContact'),
            AccountId : contc
        })
        action.setCallback(this,function(response){
            var state = response.getState();
            alert(state);
            if(state === 'SUCCESS'|| state ==='DRAFT'){
                var responseValue = response.getReturnValue();
            }else if(state ==='INCOMPLETE'){
                
            }else if(state ==='ERROR'){
                var errors = response.getError();
                console.log('Error',errors)
                if(errors|| errors[0].message){
                    
                }
            }
            
        },'ALL');
        $A.enqueueAction(action);
	}
    
})

createContact.apxc
 

public class CreateContact {
    @AuraEnabled
    public static contact createContact(contact con,String AccountId) {
        system.debug('$$contact '+con+' $$Account Id'+AccountId);
        if (AccountId != null){
            //con.AccountId = AccountId;
            insert con;
          system.debug(' CON '+con);
        }
          return con;
    }
    
}

I am getting AccountId as null in apex controller and in console log i am getting following error. "Value provided is invalid for action parameter 'AccountId' of type 'String'"

Thanks in advnace