Add DataSharingStrategy interface to 1082 branch

[ekigamba]

Fixes #1078

Type Choose one: Feature

Checklist

• [ ] I have written Unit tests for any new feature(s) and edge cases for bug fixes
• [ ] I have added any strings visible on UI components to the strings.xml file
• [ ] I have run ./gradlew spotlessApply and ./gradlew spotlessCheck to check my code follows the project's style guide