GitLab

- Adds AutomaticUsbPrinterConfigurer to CupsPrintersManager
- AUPC installs automatic usb printers as they are added

Bug: 951135
Change-Id: Ib06441e8574b4fd64deef250a6c3bc152cee11af
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1594690
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658371}