feat(share_plus): Add the intent options for the Android platform

[ozyl]

Description

• android_intent_plus does not support sharing pictures (Maybe in the future)
• share_plusdoes not support sharing to target app on android (This PR)

This PR enables share_plus to support sharing of specified applications on Android.

Platform-Specific Features

Use PlatformOptions to configure platform features.

Android

Supports fine-grained configuration of intent in Android. You can use AndroidIntentOptions to specify the app to share.

  Share.share('check out my website https://example.com', platformOptions:PlatformOptions(
    androidIntentOptions: AndroidIntentOptions(
    	packageName: 'com.example.app',
    	componentName: "com.example.app.ShareActivity",
    	flags: [
    	  AndroidIntentFlag.FLAG_ACTIVITY_CLEAR_TOP,
    	  AndroidIntentFlag.FLAG_ACTIVITY_NEW_TASK,
    	]
  ));

Related Issues

• Request [Request]: allow to use Android's intent resolver with share_plus #3269
• Related [Question]: How to start a SEND_MULTIPLE intent that sends multiple photos? #2539

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.

[miquelbeltran]

I am sorry to say that we already have a big refactor of share_plus under review here: #3404

Please, before taking the time creating big PRs, write a proposal and share it with the maintainers.

I will have to close this PR at the moment. You can incorporate the changes to the new API in #3403, but please before write a proposal somewhere (any existing ticket or create a new one).