Make inline ResourceItem able to generate ResourceValue

Make inline ResourceItem able to generate ResourceValue

This change fix the issue that since the simplification of
the resource repository, the resource item for inline ID values
would not be called to generate a ResourceValue since their
list of source file was empty.

This moves the creation of the ResourceValue to the ResourceItem
so that InlineResourceItem can override it.

This required moving findMatchingConfigurable into FolderConfiguration
which is a much better place for it anyway.

Change-Id: I36d6b148528c593ea432c9fd0ac8d542cbe2a26e