title: ionic 2 app build fail after install facebook login plugin
body: <p>i am developing <code>Hybrid</code> app using <code>ionic-2</code> in ubantu. i want to add Facebook login in my app but after install Facebook plugin app build fail if i remove Facebook plugin app will build successfully please help me. thank you.</p>
  
  <blockquote>
    <p>plugin that i installed</p>
  </blockquote>
  
  <pre><code>ionic cordova plugin add cordova-plugin-facebook4 --variable APP_ID="123456789" --variable APP_NAME="myApplication"
  </code></pre>
  
  <blockquote>
    <p>Error message</p>
  </blockquote>
  
  <pre><code>FAILURE: Build failed with an exception.
  
  * What went wrong:
  Execution failed for task ':app:processDebugResources'.
  &gt; Failed to execute aapt
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
  * Get more help at https://help.gradle.org
  
  BUILD FAILED in 17s
   FAILED
  25 actionable tasks: 1 executed, 24 up-to-date
  (node:30083) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/gradlew: Command failed with exit code 1 Error output:
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:42: AAPT: error: resource string/fb_app_id (aka drinkordering.com:string/fb_app_id) not found.
  
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:45: AAPT: error: resource string/fb_app_name (aka drinkordering.com:string/fb_app_name) not found.
  
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:49: AAPT: error: resource string/fb_app_name (aka drinkordering.com:string/fb_app_name) not found.
  
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:42: error: resource string/fb_app_id (aka drinkordering.com:string/fb_app_id) not found.
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:45: error: resource string/fb_app_name (aka drinkordering.com:string/fb_app_name) not found.
  /mnt/Workspace/work/project/ionic 2/DrinkOrdering/platforms/android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:49: error: resource string/fb_app_name (aka drinkordering.com:string/fb_app_name) not found.
  error: failed processing manifest.
  
  Failed to execute aapt
  </code></pre>