Release 4.8.8

[jkasten2]

✨ Enhancements

• Add setting to prefer HMS over FCM [4.X.X] Add setting to prefer HMS over FCM #1984
  • Add <meta-data android:name="com.onesignal.preferHMS" android:value="true"/> if you like to use this setting.

🐛 Bug Fixes

• Attempt retrying OutOfMemoryError errors when starting threads. [PlayerModel] [Fix] Retry starting new threads #2027
  • Make sure your app doesn't have any memory leaks and is handling onTrimMemory so the SDK can move on once memory is free
• Fix rare null crash with taskQueueWaitingForInit.poll() [PlayerModel] [Fix] make taskQueueWaitingForInit thread safe #2026
• Fix rare null crash with timeFocusedAtMs [PlayerModel] [Fix] make timeFocusedAtMs thread safe #2025

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