MTROnboardingPayloadParser needs to check the code type

[krypton36]

Problem

When using MTROnboardingPayloadParser API in matter framework, you have to determine which type it is before hand. MTROnboardingPayloadParser should accept any payload and determine the payload type for caller convenience.

Proposed Solution

In MTROnboardingPayloadParser determine if code type is MTROnboardingPayloadTypeQRCode, MTROnboardingPayloadTypeManualCode, MTROnboardingPayloadTypeNFC, or MTROnboardingPayloadTypeAdmin.

[bzbarsky-apple]

API surface, so 1.0 if we're going to do this.