Contacts sharing logic improvements

[Sagar0-0]

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 Neo 3t, Android 14
• Device Infinix Hot 20 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

A contact can be saved in the device contacts without the name, without the number, and email. A contact is considered valid if we can reach them out by any means whether it is phone or email.

This PR includes two improvements:

1. With the current implementation, we can share a contact as a valid contact even if it does not have a phone and an email. This PR fixes that.
2. A contact without a name should be considered valid, for cases where the name might not be present or the user may not want to share their saved weird names.

Screenshots:

Currently present invalid shared contact:

After improvements, a contact with no name and only number:
The saved contact didn't have any name but just the contact number

[greyson-signal]

This seems reasonable, thanks! It'll go in 7.31.