title: Why do I get so many unresolved symbol compile errors when trying to build from git?
body: <p>For example, I've checked out the froyo-release branch of Gallery. I imported it as a new project targeting Android 2.2 SDK.</p>
  
  <p>I'm getting the following compile errors (among others):</p>
  
  <p>The import android.provider.DrmStore cannot be resolved</p>
  
  <p>The import import android.media.MediaMetadataRetriever cannot be resolved</p>
  
  <p>From what I can tell, neither of these classes are in the SDK? Where are they? Should I be including other jars?</p>