[Android] Fix crash issue of loading app from manifest with app scheme.

The ManifestReader in Java does not understand the app scheme, so the
url of manifest.json should be convert to android_asset url before
loading the manifest content.

Bug=https://crosswalk-project.org/jira/browse/XWALK-868
Merge pull request #1514 from junmin-zhu/screen

[Android] Fix ScreenOrientation's package missing issue when integration with Cordova.
Merge pull request #1512 from gaochun/app-scheme-bug

[Android] Fix crash issue of loading app from manifest with app scheme.
[Android] Implement the onReceivedError callback.

Add the implementation of onReceivedError callback for XWalkClient,
to fix the testUrl test case failed in crosswalk-cordova-android.