chore(v4.6.x): release 4.6.16

[shaka-bot]

🤖 I have created a release beep boop

4.6.16 (2024-04-09)

Bug Fixes

• Add LOAS-AAC detection in TS (#6390) (c347e8d)
• Add ManagedMediaSource support in MediaSource polyfill (#6361) (938776c)
• Add Opus and AV1 detection in TS (#6385) (9be9183)
• Cast: Don't pause local video until the cast connection is established (#6359) (e74d90a)
• DASH: Set delay to 0 for LL streams (#6406) (0a9f97f)
• demo: Remove max height of demo config tabs (#6324) (a7b7436)
• Disable smooth codec switching in Edge Windows (#6384) (012ec5c)
• Fix cea608 whitespace rendering (#6329) (7a7a36b), closes #6328
• Fix ENCA box parsing (#6298) (1a62c24)
• Fix PES rollover in TS (#6363) (6683811)
• Fix playback stuck on initial gap (#6340) (a621642), closes #6339
• Fix SAR when transmuxing (#6309) (83b7027)
• Fix waiting for empty init datas (#6292) (e75505a), closes #6228
• HLS: Fix IAMF codec selection in HLS (#6389) (4d5727d)
• HLS: getPlayheadTimeAsDate() differs from X-EXT-PROGRAM-DATE-TIME (#6371) (090016a)
• HLS: Only offset segment ref times when needed w/ EXT-X-MEDIA-SEQUENCE (#6378) (d3696a4)
• HLS: Reset textSequenceModeOffset on discontinuity (#6388) (8cc2e24)
• Reject TS content on all platforms and transmux always (#6382) (74644d3)
• transmuxer: Support raw AAC with TS extension (#6360) (e5296c2)
• WebVTT: Remove rollover logic because we always transmux TS (#6397) (6610c22)

Performance Improvements

• Cast: memoize/cache canDisplayType results to reduce startup latency (#6367) (f54433e)
• transmuxer: Improve performance on video transmuxing (#6364) (5143ef4)

Reverts

• getPlayheadTimeAsDate() differs from X-EXT-PROGRAM-DATE-TIME (#6330) (fd0fb28)

---

This PR was generated with Release Please. See documentation.

[shaka-bot]

Incremental code coverage: 100.00%

[shaka-bot]

🤖 Release is at https://github.com/shaka-project/shaka-player/releases/tag/v4.6.16 🌻