GoogleAccountCollector
Passive collector for SignalCategory.GoogleAccount.
Reports account authenticator types, Google-account presence, visible account count and (when readable) a hash of account names, all via AccountManager without GET_ACCOUNTS.
Privacy: account names are directly identifying and therefore hashed; without GET_ACCOUNTS most accounts are hidden, so counts largely reflect grant state.
APIs probed: AccountManager.getAuthenticatorTypes/getAccountsByType/accounts.