ChooseContact opens the Contacts app so that the user can select the name and either the phone number or email address of a user.
		
		
			Example - Choose Phone Number
			
				function OnStart()
				{
				    lay = app.CreateLayout( "linear", "VCenter,FillXY" );
				    
				    btnChoose = app.CreateButton( "Choose Phone", 0.5, 0.1 );
				    btnChoose.SetOnTouch( btnChoose_OnTouch );
				    lay.AddChild( btnChoose );
				    
				    app.AddLayout( lay );
				}
				
				function btnChoose_OnTouch()
				{
				    app.ChooseContact( "phone", OnPhoneChoose );
				}
				
				function OnPhoneChoose( name, number )
				{
				     app.ShowPopup( name + " " + number );
				}
			
			
		 
		
			Example - Choose Email Address
			
				function OnStart()
				{
				    lay = app.CreateLayout( "linear", "VCenter,FillXY" );
				    
				    btnChoose = app.CreateButton( "Choose Email", 0.5, 0.1 );
				    btnChoose.SetOnTouch( btnChoose_OnTouch );
				    lay.AddChild( btnChoose );
				    
				    app.AddLayout( lay );
				}
				
				function btnChoose_OnTouch()
				{
				    app.ChooseContact( "email", OnEmailChoose );
				}
				
				function OnEmailChoose( name, email )
				{
				     app.ShowPopup( name + " " + email );
				}