Re-add sharing of the content name with the "Share" command

[acti0]

What is it?

• Bugfix (user facing)
• Feature (user facing)
• Codebase improvement (dev facing)
• Meta improvement to the project (dev facing)

Description of the changes in your PR

Sharing a content also shares its title as the subject extra intent (Intent.EXTRA_SUBJECT).

Fixes the following issue(s)

• Fixes Re-add sharing of video name with "Share" button. #6935

APK testing

The APK can be found by going to the "Checks" tab below the title. On the left pane, click on "CI", scroll down to "artifacts" and click "app" to download the zip file which contains the debug APK of this PR.

Due diligence

• I read the contribution guidelines.

[ktprograms]

@acti0 I think the preferred way is a rebase instead of a merge commit (see https://github.com/TeamNewPipe/NewPipe/wiki/How-to-merge-a-PR)

[AudricV]

Please don't concatenate the title and the content shared. Doing this will create issues when sharing crash reports (the string Error report will be always included with crash reports), and some users want only to share the URL of the content.

That's why you should use this instead:

        if (!title.isEmpty()) {
            shareIntent.putExtra(Intent.EXTRA_TITLE, title);
            shareIntent.putExtra(Intent.EXTRA_SUBJECT, title);
        }

The EXTRA_SUBJECT property of intents is supported for example by most of email clients.

[AudricV]

I tried to share some contents on several apps, on the current code implementation and on the APK generated with your changes. With these changes, the subject now appears in my notes app and in my mail client!

Thank you for readding something I removed :)