Improvise scheduled messages UI and solve edit bug

[sowjanyakch]

fix #5765

some other followups:

• There is a bug with rescheduling/editing scheduled thread replies.
• Removed native android emoji library as it does not have inbuilt search and delete emoji options. I used vanniktech library for this PR and this will be improved in future.
• More testing should be done on rescheduling, editing all messages (thread, replies, text scheduled messages)

🚧 TODO

• ...

🏁 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?)

[github-actions]

Codacy

Lint

Type	master	PR
Warnings	99	104
Errors	0	0

SpotBugs

Category	Base	New
Bad practice	6	6
Correctness	10	10
Dodgy code	54	54
Internationalization	3	3
Malicious code vulnerability	3	3
Performance	4	4
Security	1	1
Total	81	81

Lint increased!

[mahibi]

There is a bug with rescheduling/editing scheduled thread replies.

Can you describe this in more detail? What was the problem and what is fixed by the PR?

Removed native android emoji library as it does not have inbuilt search and delete emoji options. I used vanniktech library for this PR and this will be improved in future.

I suggest to use the android emoji library as this should be the default in the future in my opinion. Also if there is no search.

[sowjanyakch]

Can you describe this in more detail? What was the problem and what is fixed by the PR?

STR:

1. Create a thread.
2. Schedule a reply to the thread by long press on the send button. You can also schedule a reply to the existing thread.
3. Try to edit/reschedule the scheduled thread reply. There is an error in both the cases.

The PR will fix this issue.

You can also schedule a reply to a message. Also can edit, delete and reschedule them.

All the cases are fully supported: scheduled messages - reply to a thread, reply to a message, normal text message.

I suggest to use the android emoji library as this should be the default in the future in my opinion. Also if there is no search.

I will take a look again into it and see how we can improve this behavior.