title: Error when add platform and build with ionic cordova?
body: <p>I am using ionic to build mobile app. When I using the command: ionic cordova build android / ionic cordova platform add android it's appear following error. Please help me to fix it.</p>
  
  <p>'AppMyCity> ionic cordova platform add android</p>
  
  <blockquote>
    <p>cordova platform add android --save
    Using cordova-fetch for cordova-android@~7.0.0</p>
  </blockquote>
  
  <p>Adding android project...</p>
  
  <p>Creating Cordova project for the Android platform:</p>
  
  <pre><code>    Path: platforms\android
      Package: io.ionic.starter
      Name: MyCity
      Activity: MainActivity
      Android target: android-26
  </code></pre>
  
  <p>Subproject Path: CordovaLib
  Subproject Path: app
  Android project created with cordova-android@7.0.0</p>
  
  <p>Android Studio project detected</p>
  
  <p>Android Studio project detected</p>
  
  <p>(node:70480) UnhandledPromiseRejectionWarning: SyntaxError: Unexpected token &lt; in JSON at position 3
      at JSON.parse ()
      at getJson (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\src\plugman\util\metadata.js:29:31)
      at Object.exports.get_fetch_metadata (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\src\plugman\util\metadata.js:41:24)
      at C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\src\cordova\platform\addHelper.js:343:48
      at _fulfilled (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\node_modules\q\q.js:787:54)
      at self.promiseDispatch.done (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\node_modules\q\q.js:816:30)
      at Promise.promise.promiseDispatch (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\node_modules\q\q.js:749:13)
      at C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\node_modules\q\q.js:810:14
      at flush (C:\Users\anhde\AppData\Roaming\npm\node_modules\cordova-lib\node_modules\q\q.js:108:17)
      at _combinedTickCallback (internal/process/next_tick.js:131:7)
  (node:70480) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
  (node:70480) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code'</p>