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- This adds a new polymer element that contains a print job in the print
  management app.
- Print jobs will now appear upon app's startup.
- CSS styling + sorting will be implemented in separate CLs.
- Implemented i18n for strings. Current strings are not final.

Screenshot of current status: https://screenshot.googleplex.com/PbiY16Y7d8M

Bug: 1053704
Tests: browsertests
Change-Id: I5c96ec72bd3f528917d5b5c9876ec642a2e87fdb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2125246Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Bailey Berro <baileyberro@chromium.org>
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#756841}