code: public void setExpandActivityOverflowButtonContentDescription(int resourceId) {
          CharSequence contentDescription = mContext.getString(resourceId);
          mExpandActivityOverflowButtonImage.setContentDescription(contentDescription);
      }
docs: Sets the content description for the button that expands the activity
  overflow list.
  
  description as a clue about the action performed by the button.
  For example, if a share activity is to be chosen the content
  description should be something like "Share with".
  
  @param resourceId The content description resource id.