Create resource filtering utilities

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: util-1.0.0, util-2.0.0, util-3.0.0
• Fix Version/s: alloy-2.0.0, alloy-3.0.0, util-1.0.0, util-2.0.0, util-3.0.0, bridge-impl-2.0.0, bridge-impl-3.0.0, bridge-impl-4.0.0, bridge-impl-5.0.0
• Component/s: Liferay Faces Alloy / Showcase / Tests, Liferay Faces Bridge Impl / Demos / Tests, Liferay Faces Util
• Labels: None

{markdown}
This task requires creating the following resource filtering utilities in Liferay Faces Util:

- `ResourceUtil.toString(InputStream inputStream, String encoding, int bufferSize)`
- `ResourceUtil.toString(InputStream inputStream, String encoding)`
- `ResourceUtil.toInputStream(String string, String encoding)`
- `FilteredResourceBase` (a utility class which filters a wrapped resource)

This task also requires the removal of the previous method for filtering in Util: `ResourceHandlerWrapperBase`, `ResourceOutputStream`, and `Filterable`.{markdown}