### Problem
While using the Flutter SDK with JS SDK and with E2EE enabled, the video
from Web can not be decrypted by the Flutter app.
## Summary
Enables end-to-end encryption (E2EE) for VP9 codec. Previously, E2EE was
skipped for all SVC codecs. This aligns the Flutter SDK with the JS SDK,
where E2EE works with VP9 codec.
## Changes
Removed `isSVCCodec()` and use `isAV1Codec()` to enable E2EE setup for
VP9 codec in `LocalTrackPublishedEvent` handler
Removed `isSVCCodec()` and use `isAV1Codec()` to enable E2EE setup for
VP9 codec in `TrackSubscribedEvent` handler
Is there any specific reason why E2EE is disabled for SVC codecs?
I tried VP9 with this patch and the VP9 video from Web can be decrypted
by Flutter app.
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