EXTRA_REMOTE_INPUT_HISTORY
extras key: this is the remote input history, as supplied to setRemoteInputHistory. Apps can fill this through setRemoteInputHistory with the most recent inputs that have been sent through a RemoteInput of this Notification and are expected to clear it once the it is no longer relevant (e.g. for chat notifications once the other party has responded). The extra with this key is of type CharSequence[] and contains the most recent entry at the 0 index, the second most recent at the 1 index, etc.