[release/2.2.1.6] version update. Fix history saving in wrong thread

Author: MichaelReyes

tripkituisample/src/main/AndroidManifest.xml

@@ -29,7 +29,8 @@
             android:exported="false" />
         <activity android:name=".location_search.LocationSearchActivity" />
         <activity android:name=".autocompleter.AutocompleterActivity" />
-        <activity android:name=".MainActivity">
+        <activity android:name=".MainActivity"
+            android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />