title: Building modified AOSP throws error (Trying to change API)
body: <pre><code>out/target/common/obj/PACKAGING/public_api.txt:4316: error 5: Added public field android.app.admin.DevicePolicyManager.PASSWORD_QUALITY_MOVEMENT
  
  
  ******************************
  You have tried to change the API from what has been previously approved.
  
  To make these errors go away, you have two choices:
     1) You can add "@hide" javadoc comments to the methods, etc. listed in the
        errors above.
  
     2) You can update current.txt by executing the following command:
           make update-api
  
        To submit the revised current.txt to the main Android repository,
        you will need approval.
  ******************************
  </code></pre>
  
  <p>So i tried to add an @hide annotation to my member variable, but it will only give me another error: </p>
  
  <pre><code>frameworks/base/core/java/android/app/admin/DevicePolicyManager.java:233: cannot find symbol
  symbol  : class hide
  location: class android.app.admin.DevicePolicyManager
      @hide
  </code></pre>
  
  <p>How can I solve this problem?</p>