title: How to update a Preference with a SummaryProvider in a PreferenceFragmentCompat?
body: <p>In <code>androidx.preference.Preference</code> (using Version 1.1.0-beta01) it is possible to set a summary provider, which I did inside the <code>onCreatePreferences</code> method of a <code>PreferenceFragmentCompat</code>.</p>
  
  <pre><code>override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
    ...
  
    val mySummaryProvider = Preference.SummaryProvider&lt;Preference&gt; {
       val str = preferenceManager.sharedPreferences.getString(it.key, "")
       doSomethingCool(str)
    }
  
    findPreference&lt;Preference&gt;("my_pref_id").summaryProvider = mySummarProvider
  }
  </code></pre>
  
  <p>When I now update the preference (by using the preference editor) while the fragment is still visible, how do I notify the preference or the fragment that the summary provider should be called again (it isn't done automatically)? Unfortunately, I don't see any method or way to do that.</p>