Add preload manager to exoplayer to improve short form playback experience

[MayuriKhinvasara]

Add preload manager to exoplayer to improve short form playback experience

(1) Add preload manager for exoplayer (2) Create an Wrapper class to manage and customize all functionalities of preload (PreloadManagerWrapper)(3) Add preload manager as an optional to Timeline screen (4) Add 10 remote videos to chats by sending :preload: message to any chat (5) Replace Timeline surface view with Player view for better performance.

In order to test / generate a bunch of short form videos in the Timeline View, send a "preload" text message to any chat in the Chat screen. Thereby a list of 10 short videos urls (listed in ShortsVideoList class) will be sent as a response. These vidoes can then be used in the Timeline View to scroll .

[calren]

i think we'll need a follow up PR for a 'offline' state for the app's timeline screen, can we file an issue for this so we don't forget?

right now if there's no internet connection, there will be a lot of black videos on the timeline.

lgtm otherwise, super cool to see it implemented!

[riggaroo]

I think the placement of the preloading video feature should be on the main screen as "story" type UI and not with a special incoming message.

You can use the new HorizontalMultiBrowseCarousel in Material to add these at the top of the UI, and load it as needed.

[riggaroo]

This experience for testing is okay, but if you want to merge this, it should probably be in the main text UI as "story" type blocks that open up this screen, as this just seems like a broken user experience.

[riggaroo]

The UI doesn't load the content properly for me into a Pager, the visuals sometimes appear in the chat but not reliably.

Also after sometime of running the app, it crashes:

FATAL EXCEPTION: FinalizerWatchdogDaemon (Ask Gemini)
                                                                                                    Process: com.google.android.samples.socialite, PID: 15726
                                                                                                    java.util.concurrent.TimeoutException: android.media.MediaMetadataRetriever.finalize() timed out after 10 seconds
                                                                                                    	at android.media.MediaMetadataRetriever.native_finalize(Native Method)
                                                                                                    	at android.media.MediaMetadataRetriever.finalize(MediaMetadataRetriever.java:1109)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:370)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.processReference(Daemons.java:350)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:322)
                                                                                                    	at java.lang.Daemons$Daemon.run(Daemons.java:131)
                                                                                                    	at java.lang.Thread.run(Thread.java:1012)

[MayuriKhinvasara]

The UI doesn't load the content properly for me into a Pager, the visuals sometimes appear in the chat but not reliably.

Also after sometime of running the app, it crashes:

FATAL EXCEPTION: FinalizerWatchdogDaemon (Ask Gemini)
                                                                                                    Process: com.google.android.samples.socialite, PID: 15726
                                                                                                    java.util.concurrent.TimeoutException: android.media.MediaMetadataRetriever.finalize() timed out after 10 seconds
                                                                                                    	at android.media.MediaMetadataRetriever.native_finalize(Native Method)
                                                                                                    	at android.media.MediaMetadataRetriever.finalize(MediaMetadataRetriever.java:1109)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:370)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.processReference(Daemons.java:350)
                                                                                                    	at java.lang.Daemons$FinalizerDaemon.runInternal(Daemons.java:322)
                                                                                                    	at java.lang.Daemons$Daemon.run(Daemons.java:131)
                                                                                                    	at java.lang.Thread.run(Thread.java:1012)

Can you help file a bug for this with repro steps, Seems like network or server issue.