[Android] Fix xwalk_app_template crash issue after rebasing to 35

The apps which were packaged with xwalk_app_template will crash.
It's because the icudtl.dat was not packaged into the apk.

BUG=XWALK-1383
Merge pull request #1808 from kurli/app-template-fail

[Android] Fix xwalk_app_template crash issue after rebasing to 35