SFrameTransform & friends constructors take an optional SFrameTransformOptions dictionary

[youennf]

SFrameTransformOptions has a required attribute so we should fix it by:

• Setting a default value for cipherSuite
• Make SFrameTransformOptions options non optional

[dontcallmedom-bot]

This issue was mentioned in WebRTC TPAC 2025 meeting - day 2 – 13 November 2025 (Mediacapture-transform and track transfer)