Improvements: - Download support combined DASH. - Casying support combined DASH. Fixes: - Various updates to bg update flow. Throttled progress updates in notifications resolving the notifications not showing under some conditions. Properly cancel notifications when interacting with in-app dialogs. Added install failed notification. Added install success notification. Added default behavior for tapping on notifications. Fixed crash in install receiver. - Fixed HLS downloading for Twitch, DialyMotion, Nebula.