[Benefits] Add filled and submitted metrics for card benefit

Metrics doc:
http://go/card-benefits-metrics-plan

Events implemented in this change:
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITH_BENEFIT_AVAILABLE_FILLED
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITHOUT_BENEFIT_AVAILABLE_FILLED
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITH_BENEFIT_AVAILABLE_FILLED_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITHOUT_BENEFIT_AVAILABLE_FILLED_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_FILLED_AFTER_CARD_WITH_BENEFIT_AVAILABLE_SHOWN_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITH_BENEFIT_AVAILABLE_SUBMITTED_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITHOUT_BENEFIT_AVAILABLE_SUBMITTED_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_SUBMITTED_AFTER_CARD_WITH_BENEFIT_AVAILABLE_SHOWN_ONCE

Events still to be depreciated in future CLs:
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITH_BENEFIT_AVAILABLE_WILL_SUBMIT_ONCE
FORM_EVENT_SUGGESTION_FOR_SERVER_CARD_WITHOUT_BENEFIT_AVAILABLE_WILL_SUBMIT_ONCE


Bug: b/313947877, b/331420063
Change-Id: I556acd2c026bd3f8649cfbd011a6a219c309ac6b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5376735


Reviewed-by: Alexander Tekle <alexandertekle@google.com>
Reviewed-by: Olivia Saul <jsaul@google.com>
Reviewed-by: Peter Kotwicz <pkotwicz@chromium.org>
Commit-Queue: Yishui Liu <yishuil@google.com>
Cr-Commit-Position: refs/heads/main@{#1283636}