Browser Fixes.

- Move the browser targeted verion to SDK 19.
- Remove hack to create dummy webview to call into
  singleton classes and use Engine class.
- Add missing methods to compile for API 19.

Change-Id: Ie765921f1227eb5de314ed29c5ce909bee6aea93
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 7561146..b9b67d1 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -382,7 +382,7 @@
                  android:exported="false" />
     </application>
 
-    <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="16" />
+    <uses-sdk android:minSdkVersion="16" android:targetSdkVersion="19" />
 
     <uses-feature android:name="android.hardware.location.gps" android:required="false" />