[TIMOB-2729] Android: runtime errors and intermittent crash when removing values from picker

   Location: [77,20] examples/picker_android_spinner_text.js
   
   Message: Uncaught error: Invalid value, expected type Object.
   
   Source: picker.columns[0].removeRow(picker.columns[0].rows[3]);
   

   W/PickerColumnProxy( 4370): Unable to remove the row. Invalid type for row.
   

   W/PickerColumnProxy( 4859): Unable to add the row. Invalid type for row.
   

   var w = Ti.UI.createWindow({
   	backgroundColor : 'black'
   });
   var status = Ti.UI.createLabel({
   	top : 5,
   	left : 5,
   	right : 5,
   	height : 40,
   	textAlign : 'center'
   });
   w.add(status);
   
   function showStatus(s) {
   	status.text = s;
   }
   
   var names = ['Joanie', 'Mickey', 'Jean-Pierre', 'Gustav', 'Raul', 'Mimi', 'Emily', 'Sandra', 'Carrie', 'Chachi'];
   var verbs = ['loves', 'likes', 'visits', 'loathes', 'waves to', 'babysits', 'accompanies', 'teaches', 'announces', 'supports', 'knows', 'high-fives'];
   
   var rows1 = [];
   for (var i = 0; i < names.length; i++) {
   	rows1.push(Ti.UI.createPickerRow({
   		title : names[i]
   	}));
   }
   
   var rows2 = [];
   for ( i = 0; i < verbs.length; i++) {
   	rows2.push(Ti.UI.createPickerRow({
   		title : verbs[i]
   	}));
   }
   
   var rows3 = [];
   for ( i = (names.length - 1); i >= 0; i--) {
   	rows3.push(Ti.UI.createPickerRow({
   		title : names[i]
   	}));
   }
   
   var column1 = Ti.UI.createPickerColumn({
   	rows : rows1,
   	font : {
   		fontSize : "12"
   	}
   });
   var column2 = Ti.UI.createPickerColumn({
   	rows : rows2,
   	font : {
   		fontSize : "12"
   	}
   });
   var column3 = Ti.UI.createPickerColumn({
   	rows : rows3,
   	font : {
   		fontSize : "12"
   	}
   });
   
   var picker = Ti.UI.createPicker({
   	useSpinner : true,
   	visibleItems : 7,
   	type : Ti.UI.PICKER_TYPE_PLAIN,
   	top : 150,
   	height : 200,
   	columns : [column1, column2, column3]
   });
   
   picker.addEventListener('change', function(e) {
   	showStatus(e.selectedValue[0] + " " + e.selectedValue[1] + " " + e.selectedValue[2]);
   });
   
   w.add(picker);
   
   var btnAdd = Ti.UI.createButton({
   	left : 5,
   	height : 40,
   	top : 50,
   	title : 'Add "Manny"'
   });
   btnAdd.addEventListener('click', function() {
   	picker.columns[0].addRow(Ti.UI.createPickerRow({
   		title : 'Manny'
   	}));
   	picker.columns[2].addRow(Ti.UI.createPickerRow({
   		title : 'Manny'
   	}));
   	picker.columns[1].addRow("something");
   	showStatus('"Manny" added to columns 0 & 2');
   });
   w.add(btnAdd);
   
   var btnRemove = Ti.UI.createButton({
   	left : 5,
   	height : 40,
   	top : 100,
   	title : 'Remove all idx 8'
   });
   btnRemove.addEventListener('click', function() {
   	picker.columns[0].removeRow(picker.columns[0].rows[8]);
   	picker.columns[1].removeRow(picker.columns[1].rows[8]);
   	picker.columns[2].removeRow(picker.columns[2].rows[8]);
   	showStatus("value at index 8 of each col. removed");
   });
   w.add(btnRemove);
   
   w.open();