Add phone switching status for account match success

This status will be tracked in order to remove the cancel button for the
phone switching flow in the case that account matching is already
successful.

Bug: 348972325
Test: manual build
Flag: com.google.android.wearable.setupwizard.flags.remove_phone_switching_cancel_on_account_match
Change-Id: Id0baad1f415e0f17c6ee56daeee1296663570381