build(android): rework merging of external library's resources (#11094)

Fixes TIMOB-27252

android/cli/lib/base-builder.js

@@ -48,7 +48,20 @@ AndroidBaseBuilder.prototype.writeXmlFile = function writeXmlFile(srcOrDoc, dest
 		if (n) {
 			nodes[node.tagName] || (nodes[node.tagName] = {});
 			if (nodes[node.tagName][n] && n !== 'app_name') {
-				_t.logger.warn(__('Overwriting XML node %s in file %s', String(n).cyan, dest.cyan));
+				// We have a node with the same name. Merging as follows:
+				// Nodes with the same name get overwritten to maintain backwards compatiblity.
+				// Nodes with different name are appended to the parent node.
+				_t.logger.debug(__('Merging XML node %s in file %s', String(n).cyan, dest.cyan));
+				xml.forEachElement(node, function (childNode) {
+					// We have node with the same name, remove the current one.
+					xml.forEachElement(nodes[node.tagName][n], function (alreadyAddedChild) {
+						if (alreadyAddedChild.getAttribute('name') === childNode.getAttribute('name')) {
+							alreadyAddedChild.parentNode.removeChild(alreadyAddedChild);
+						}
+					});
+					nodes[node.tagName][n].appendChild(childNode.cloneNode(true));
+				});
+				return;
 			}
 			nodes[node.tagName][n] = node;
 		}