Release Scalebar Plugin v9-0.1.0

[langsmith]

mapbox-android-plugin-scalebar-v9:0.1.0

Features

• Switching all plugins to AndroidX Switching all plugins to AndroidX #1100

Bugs

• Fix scale bar incorrect scale. Fix scale bar incorrect scale. #1088

Release checklist

• Cut the release branch
• Run through testapp/demo app and test all activities
• Update CHANGELOG.md
• Change version names in gradle.properties
• Publish artifacts to Maven Central
• Change version name back to SNAPSHOT
• Merge the release branch back to master
• Tag releases in GitHub

Post-release @langsmith

• Update README.md
• Update constants.js file in android-docs repo
• Generate updated javadocs and add to android-docs repo
• If needed, bump dependencies in https://github.com/mapbox/mapbox-android-demo

/cc: @mapbox/android @mapbox/enterprise-support @mapbox/maps-pms

[langsmith]

Actually, closing this in favor of a ticket I will make that covers all of the plugins, rather than doing a new ticket for each plugin. Basically a new version of #987.