In some versions of Cronet, the request provided by the callback is not always the same. This leads to callback not completing and request timing out.
The fix changes from having one `UrlRequestCallback` per `CronetDataSource` to one `UrlRequestCallback` per `UrlRequest`. Everytime a current request is canceled, the current callback is closed.
PiperOrigin-RevId: 627379153
Many usages are needed to support other deprecations and some
can be replaced by the recommended direct alternative.
Also replace links to deprecated/redirected dev site
PiperOrigin-RevId: 601795998
MP4 edit lists sometimes ask to start playback between two samples.
If this happens, we currently change the timestamp of the first
sample to zero to trim it (e.g. to display the first frame for a
slightly shorter period of time). However, we can't do this to audio
samples are they have an inherent duration and trimming them this
way is not possible.
#minor-release
PiperOrigin-RevId: 543420218
