[BUGFIX] Properly HTML encode URI in renderer

The audio and video tag renderer fails to properly
encode the URI of the files for HTML.

Fix this and adapt the tests.

Resolves: #64000
Releases: master
Change-Id: Iac6d06ce9cabac31545e8cb5f542f3d096990ebe
Reviewed-on: http://review.typo3.org/35600
Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Roman Schürmann <roman.schuermann@wmdb.de>
Tested-by: Roman Schürmann <roman.schuermann@wmdb.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>