Support for new manifest location in cordova-android 7.x

Author: gnarvaja

hooks/lib/android/manifestWriter.js

@@ -2,6 +2,7 @@
 Class injects plugin preferences into AndroidManifest.xml file.
 */
 
+var fs = require('fs');
 var path = require('path');
 var xmlHelper = require('../xmlHelper.js');
 
@@ -19,6 +20,11 @@ module.exports = {
  */
 function writePreferences(cordovaContext, pluginPreferences) {
   var pathToManifest = path.join(cordovaContext.opts.projectRoot, 'platforms', 'android', 'AndroidManifest.xml');
+
+  if (!fs.existsSync(pathToManifest)) {
+    pathToManifest = path.join(cordovaContext.opts.projectRoot, 'platforms', 'android', 'app', 'src', 'main', 'AndroidManifest.xml');
+  }
+
   var manifestSource = xmlHelper.readXmlAsJson(pathToManifest);
   var cleanManifest;
   var updatedManifest;