modify contact-related API

[lockys]

Have influence on

GET /api/v1/accounts/{user-uuid}/contacts
POST /api/v1/accounts/{user-uuid}/contacts/{qrCodeUuid}
PUT  /api/v1/accounts/{user-uuid}/contacts/{qrCodeUuid}
DELETE /api/v1/accounts/{user-uuid}/contacts/{qrCodeUuid}

[qoojung]

Contact type: 3 types

• icon (0)
• app user free (1)
• app user charge (2)

Contact state 2 types

• enabled
• disabled