Fixes #13864 - Avoid Changing to same Phone Number

[Sagar0-0]

Closes #13864

First time contributor checklist

• I have read how to contribute to this project
• I have signed the Contributor License Agreement

Contributor checklist

• I am following the Code Style Guidelines
• I have tested my contribution on these devices:

• Device Realme GT NET 3T, Android 14
• Device Infinix hot 20 Pro, Android 14
• Virtual device Pixel 8 Pro, Android 14

• My contribution is fully baked and ready to be merged as is
• I ensure that all the open issues my contribution fixes are mentioned in the commit message of my first commit using the Fixes #1234 syntax

---

Description

Added a toast for this condition, like handled for other cases.
A better way is to disable the button and/or show a text message on the screen instead of showing toasts(For all handled conditions).

[Sagar0-0]

I hope some CI/CD is already integrated to generate the string resources for other languages. Let me know if those are required to enter manually or not.