share code with EstimateTLVStructOverhead to estimate TLV structure size.

[todo]

connectedhomeip/src/credentials/CertificationDeclaration.h

Lines 39 to 49 in a8f245f

	// TODO: share code with EstimateTLVStructOverhead to estimate TLV structure size.
	static constexpr uint32_t kCertificationElements_TLVEncodedMaxLength = (1 + 1) + // Length of header and end of outer TLV structure.
	(3 + kCertificateIdLength) + // Encoded length of CertificateId string.
	(1 + sizeof(uint16_t)) * kMaxProductIdsCountPerCD + 3 + // Max encoding length of an array of 100 uint16_t elements.
	(2 + sizeof(uint8_t)) * 2 + // Encoding length of two uint8_t element.
	(2 + sizeof(uint16_t)) * 7; // Max total encoding length of seven uint16_t elements.
	static constexpr uint32_t kMaxCMSSignedCDMessage = 183 + kCertificationElements_TLVEncodedMaxLength;
	struct CertificationElements
	{

---

This issue was generated by todo based on a TODO comment in a8f245f when #10825 was merged. cc @emargolis.

[emargolis]

fixed with #12329