Generalize MASTG-TEST-0375 for both implicit and explicit intents

[TheDauntless]

MASTG-TEST-0375: Missing Validation of Data Returned from Implicit Intents

This test focusses on Implicit intents, but there's no reason for that. Implicit intents are definitely more 'dangerous', but it's not because an explicit intent is used, that the other app is inherently trusted.

You could have a button 'attach file from dropbox' in your app, which uses an explicit intent to trigger dropbox, but it doesn't mean you should trust the data that dropbox returns.

[KirthiSaiT]

Hi maintainers, I'd like to work on this. Could you assign me? and also I have read the contribution guidelines and the PR template and I confirm that I will follow them.

[github-actions]

Hi @KirthiSaiT, thanks for your interest in contributing to OWASP MASTG.

Before we can assign you to this issue, please confirm that you have read and understand our contribution guidelines.

See https://github.com/OWASP/mastg/blob/master/.github/PULL_REQUEST_TEMPLATE.md and all linked documents.

To confirm, please reply with the following message, copy paste it exactly.

I have read the contribution guidelines and the PR template and I confirm that I will follow them.

[KirthiSaiT]

I have read the contribution guidelines and the PR template and I confirm that I will follow them.

[github-actions]

Thank you @KirthiSaiT for accepting the contribution guidelines.

Your assignment request has been noted and labeled, a maintainer will review and assign you to this issue shortly, please refrain from making a pull request until you have been officially assigned.