[Contacts] Update implementation to match spec changes.

- Expose the `address` property and place it behind a flag.
- Add & implement the getProperties method.

Change-Id: If9bbebde6b8d076fd48b0b8a3584181e40adc1d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1835621
Reviewed-by: Stephen White <senorblanco@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Rayan Kanso <rayankans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702810}

• third_party/blink/public/mojom/web_feature/web_feature.mojom[diff]
• third_party/blink/renderer/modules/contacts_picker/contacts_manager.cc[diff]
• third_party/blink/renderer/modules/contacts_picker/contacts_manager.h[diff]
• third_party/blink/renderer/modules/contacts_picker/contacts_manager.idl[diff]
• third_party/blink/renderer/modules/contacts_picker/contacts_select_options.idl[diff]
• third_party/blink/renderer/platform/runtime_enabled_features.json5[diff]
• third_party/blink/web_tests/external/wpt/contacts/contacts-select.https.window.js[diff]
• third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt[diff]
• tools/metrics/histograms/enums.xml[diff]