title: Best practice for package structure in an MVP project
body: <p>I have an Android Studio project that is using an MVP architecture.
  What is the advised packages structure for a project this style 
  we can do:</p>
  
  <pre><code>app:
    screen_name
      activityA
      presenterA
      interfaceA
  
  or:
     activities
       activityA
       activityB
     preentors
       presentorA
       presentorB
  etc
  </code></pre>