phone-extension/{extension Id}-line keys

Number of APIs: 3

1. Get line key position and settings information GET {{baseUrl}}/phone/extension/:extensionId/line_keys

2. Batch update line key position and settings information PATCH {{baseUrl}}/phone/extension/:extensionId/line_keys

3. Delete a line key setting. DELETE {{baseUrl}}/phone/extension/:extensionId/line_keys/:lineKeyId