### Description
Implements mobile data streaming confirmation (allow once/always
notification) in Media3PlaybackService, matching the legacy
PlaybackService behavior. Includes pre-Oreo PendingIntent compatibility,
stale notification cleanup on new media load, and a streaming guard for
queue auto-advance.
Fixes#8301
### Checklist
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- [x] I have run the automated code checks using `./gradlew checkstyle
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---------
Co-authored-by: ByteHamster <info@bytehamster.com>
### Description
Build media item stub in main thread and full item in background thread.
We later plan to add more things to load to the main item creation code,
which should not run on the main thread.
Contributes to #8261
### Checklist
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- [x] I have performed a self-review of my code, going through my
changes line by line and carefully considering why this line change is
necessary
- [x] I have run the automated code checks using `./gradlew checkstyle
spotbugsPlayDebug spotbugsDebug :app:lintPlayDebug`
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### Description
Add back Chromecast support. This is so easy with media3 now :)
Closes#8265
### Checklist
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- [x] I have read the contribution guidelines:
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- [x] I have performed a self-review of my code
- [x] I have run the automated code checks using `./gradlew checkstyle
spotbugsPlayDebug spotbugsDebug :app:lintPlayDebug`
- [x] My code follows the style guidelines of the AntennaPod project:
https://antennapod.org/contribute/develop/app/code-style
- [x] I have mentioned the corresponding issue and the relevant keyword
(e.g., "Closes: #xy") in the description (see
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- Run Checkstyle with gradle to make it easier for users
- No longer needs different configuration for new code
- Exclude current violations
- Fix some violations that somehow couldn't be specified in the exclusion file
- Print SpotBugs/Lint/Checkstly violations in GitHub format
- Then the CI run gets annotated on the web UI
