Allow the baloo widgets to display creation date and access date.

Summary:
New fields accessed and created in dolphin/baloo-widgets information panel:
{F6761789}

GUI: New fields accessed and created in dolphin/baloo-widgets information panel
CCBUG: 286689

Test Plan: Tested locally

Reviewers: ngraham, elvisangelaccio, bruns

Reviewed By: ngraham, elvisangelaccio, bruns

Subscribers: bruns, #baloo

Tags: #baloo

Differential Revision: https://phabricator.kde.org/D20404