data: Update AndroidManifest for Crosswalk 9
data: Update AndroidManifest for Crosswalk 9

For Crosswalk 9 the application base class is
org.xwalk.core.XWalkApplication. Update AndroidManifest.xml.tpl to
reflext that. This means the master branch does not support
Crosswalk 8 any longer, only 9 and (potentially) newer releases.

Fixes #10

davidmaxwaterman/crosswalk-app-tools,pozdnyakov/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,shawngao5/crosswalk-app-tools,hgl888/crosswalk-app-tools,baleboy/crosswalk-app-tools,baleboy/crosswalk-app-tools,shawngao5/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,davidmaxwaterman/crosswalk-app-tools,pozdnyakov/crosswalk-app-tools,crosswalk-project/crosswalk-app-tools,hgl888/crosswalk-app-tools,baleboy/crosswalk-app-tools