title: Add button to Android's copy/paste bar to all applications
body: <p>I would like to add a button to the "selection bar".</p>
  
  <p><img src="https://i.stack.imgur.com/KV0Sy.png" alt="enter image description here"> </p>
  
  <p>that would be present in all applications - or, in other words, I would like to modify the default buttons of this bar.</p>
  
  <p>I've searched for it, however, it seems to me that most solutions are about modifying the bar of a specific app. For example <a href="https://stackoverflow.com/questions/9892661/interface-from-text-selection-tool-where-copy-paste-is">this question</a> - but I am not sure if the question is about the general modification that I want to do and I don't want to change the <a href="http://www.stealthcopter.com/blog/wp-content/uploads/2010/04/cm2.png" rel="nofollow noreferrer">context menu</a>, but the "selection bar".</p>
  
  <p>So, is it possible to modify this bar? If yes, could someone please provide links/examples for the same.</p>