Add the Telegram link

app/src/main/res/values/strings.xml

@@ -527,6 +527,7 @@
     <string name="settings_about">About</string>
     <string name="settings_about_author">Author</string>
     <string name="settings_about_author_summary" translatable="false">Hippo &lt;ehviewersu$gmail.com&gt;</string>
+    <string name="settings_about_telegram">Telegram</string>
     <string name="settings_about_google_plus">Google+ Community</string>
     <string name="settings_about_website">Website</string>
     <string name="settings_about_source">Source</string>

app/src/main/res/xml/about_settings.xml

@@ -23,6 +23,11 @@
         android:key="author"
         android:title="@string/settings_about_author"/>
 
+    <com.hippo.preference.UrlPreference
+      android:key="telegram"
+      android:title="@string/settings_about_telegram"
+      app:url="https://t.me/ehviewer"/>
+
     <com.hippo.preference.UrlPreference
         android:key="google_plus"
         android:title="@string/settings_about_google_plus"