Adding bubbles support

[arlexTech]

Issue: https://github.com/nextcloud/talk-android/issues/3384

🖼️ Screenshots

General settings	Conversation Info

https://github.com/user-attachments/assets/d48935d7-b47d-4473-a7fc-c078683e4cc9

https://github.com/user-attachments/assets/0e90219a-8e0d-4319-9a36-71dc538aadac

🚧 TODO

• [x] Bubble Works
• [x] Activating bubbles in settings
• [x] Activating or not bubbles for each conversation
• [x] Use Conversation Avatar for bubble icon
• [x] Multiple bubbles for multiple conversations
• [x] Embedded view
• [x] Create a bubble notification upon received message

🏁 Checklist

• [ ] ⛑️ Tests (unit and/or integration) are included or not needed
• [ ] 🔖 Capability is checked or not needed
• [ ] 🔙 Backport requests are created or not needed: /backport to stable-xx.x
• [ ] 📅 Milestone is set
• [ ] 🌸 PR title is meaningful (if it should be in the changelog: is it meaningful to users?)

[mahibi]

thank you @arlexTech we will review soon!

[mahibi]

@rapterjet2004 @sowjanyakch please also do a deep review. E.g. specially check if former notification handling is affected by the changes.

[arlexTech]

I'll work on it this week (don't mind the review request i miss clicked)

[mahibi]

I'll work on it this week (don't mind the review request i miss clicked)

Sure, thanks. Let us know if there are any questions or help is needed!

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[arlexTech]

For the back button in bubbled mode I replaced it by the talk icon in bubble mode which open the app in normal mode on the conversation list

as onBackPressed is deprecated we want to avoid it and use onBackPressedDispatcher

fixed

multiple instances of the app are opened when "open is app" is used. https://developer.android.com/develop/ui/views/notifications/bubbles#launching-activities

should be fixed, I couldn't open multiple anymore

please try to extract the above code into a method

done

why is this removed?

because it was preventing bubbles to show up but it should be fixed now

I wanted the handleOnBackPressed function to minimize the bubble but I tried for hours and never managed to make it work correctly, if anyone has an idea of how to do it, I'm open to try anything at this point

Tell me if i can do anything more to merge it

[arlexTech]

But also we should not allow to have 2 instances for the same conversation when one is opened in normal mode and one in bubble mode. This is very important to avoid bugs in the chat repository (OfflineFirstChatRepository)! Signal solved it this way: Whenever there is a bubble for a chat and the chat is also opened in the normal mode, the bubble closes. We should solve it the same way and try to use only one instance of ChatActivity for a conversation.

I didn't see this part, I wonder how Messenger deal with that because it can have the bubble and the chat open at the same time

[arlexTech]

Thank you for your feedback, i try to fix all of this and if I'm hard stuck I'll ask for help