[Tizen][Runtime] Add tizen application handler.

Add a handler for tizen application element, so that we
can get and validate tizen application info from tizen
particularly widget package.

Feature=https://crosswalk-project.org/jira/browse/XWALK-1161
FeatureID: 0200, 0210
Merge pull request #1777 from yeyuyinjie/master

[Tizen][Runtime] Add tizen application handler.