refactor: AGP 8.0 Support: Compile share_plus wth JavaVersion.VERSION_1_8

[francis94c]

Description

This PR ensures that the share_plus plugin will now compile with JDK 1.8 on the android side

Related Issues

• None.

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I titled the PR using Conventional Commits.
• I did not modify the CHANGELOG.md nor the plugin version in pubspec.yaml files.
• All existing and new tests are passing.
• The analyzer (flutter analyze) does not report any problems on my PR.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate that with a ! in the title as explained in Conventional Commits).
• No, this is not a breaking change.

[vbuberen]

Plugins won't move to Java 8.

Closing as invalid.