AndroidPlatform: Print actual version after update()
AndroidPlatform: Print actual version after update()

Pass back the version of the actually extracted crosswalk release
from importCrosswalk() and print that version at the end of the
update() method.

Fixes https://crosswalk-project.org/jira/browse/XWALK-4054

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