[Tizen][Runtime] Enable to load local resources using file protocol.

For WGT package, loading local resources using file protocol will be
blocked by xwalk runtime, even the permission is granted by CSP or WARP
policy rules. The patch will grant the access permission for file
protocol if it's enabled by CSP or WARP security policy.

BUG=XWALK-1990
Merge pull request #2124 from takethathe/local_resource

[Tizen][Runtime] Enable to load local resources using file protocol.