[Application] Fix cannot get application info from pkgmgr db.

Since xwalk already storage [tizen_app_id] and [package_id] of wgt
to pkgmgr db, so that we cannot get application info from pkgmgr db
by [app_id].

And xwalk will send [tizen_app_id] to extensions, so that we can
get [package_id] from [tizen_app_id] and get application info from
pkgmgr db according to the [package_id].

BUG=XWALK-2110
See https://source.tizen.org/sites/default/files/page/tizen-2.2-wrt-core-spec.pdf 
``<tizen:application />`` -> ``package`` for ``tizen_wrt_10bytes_package_id``
And ``crosswalk_32bytes_app_id`` was equal to app_id.