API: Handle Messages in errorArrayToStatus()

API: Handle Messages in errorArrayToStatus()

Two bugs here:
* If the error array contains an entry using a Message object instead of
  a string as the key, it'll blow up trying to do
  `self::$blockMsgMap[$error[0]]`.
* If the error array contains a Message object not wrapped in an array,
  it'll blow up trying to do `...(array)$error`.

Bug: T217382
Change-Id: I2a08e02bca0fb194416b3f2e6a1d6192d5c13cb2