Add M3U playlist support

[anilbeesetti]

No Jira ticket is associated with this change.

Summary

• add URL and document-based M3U playlist import with metadata, URI resolution, persisted document permissions, and HLS manifest rejection
• persist linked playlist types and metadata through Room schema version 10, including transactional manual refresh with playback-history preservation
• add linked-playlist UI, SystemService feedback, database-backed playback queues, and remote title/artwork handling

Verification

• ./gradlew test
• ./gradlew assembleDebug
• ./gradlew ktlintCheck
• ./gradlew :core:database:connectedDebugAndroidTest :feature:playlist:connectedDebugAndroidTest
• Pixel 6a AVD, Android 16 / API 36: URL and file import, persisted file access after restart, refresh, name retention, HLS rejection, playback queue, title/artwork metadata, and local-playlist regression flow
• CPH2689, Android 16: debug APK installed successfully