AndroidManifest Package Name error : <blockquote>
  <p>error: attribute 'package' in  tag is not a valid Android package name: 'com.familyfit.google.22pushups'.
  Message{kind=ERROR, text=error: attribute 'package' in  tag is not a valid Android package name: 'com.familyfit.google.22pushups'., sources=[/Users/manlokwong/Desktop/familyfit/22-pushups-android/app/build/intermediates/manifests/full/debug/AndroidManifest.xml:2], original message=, tool name=Optional.of(AAPT)}</p>
</blockquote>

<p>I don't know why I cannot set this package name.<br>
<code>com.familyfit.google.22pushups</code></p>
