Make efficient seeks near the end of the available range safe

[waliid]

Description

This PR allows us to bypass an issue that occurs when we seek at the end with some streams.

Changes made

• Enhance accuracy towards the end of playback by removing the tolerance before and after.

Checklist

• [x] APIs have been properly documented (if relevant).
• [x] The documentation has been updated (if relevant).
• [x] New unit tests have been written (if relevant).
• [x] The demo has been updated (if relevant).
• [x] The playground has been updated (if relevant).

[defagos]

Still an issue on iOS 17.4.1. Need to keep.