title: What is touch mode and why is it important for the *ActivityTestRule* class?
body: <p>The <code>android.support.test.rule.ActivityTestRule</code> class (see <a href="http://developer.android.com/reference/android/support/test/rule/ActivityTestRule.html">here</a>) takes in an <code>initialTouchMode</code> parameter in its constructor. This is not explained in the class reference (or anywhere online) except as follows:</p>
  
  <blockquote>
    <p>initialTouchMode - true if the Activity should be placed into "touch mode" when started</p>
  </blockquote>
  
  <p>What exactly does "touch mode" mean? And what are the implications of setting <code>initialTouchMode</code> in <code>ActivityTestRule</code> to <code>true</code> or <code>false</code>? (I see that the default value for this parameter is <code>false</code>).</p>