Bump coroutines dependencies version to 1.4.0

[Guardiola31337]

Description

Bumps Coroutines version to 1.4.0 🎉

• I have added any issue links
• I have added all related labels (bug, feature, new API(s), SEMVER, etc.)
• I have added the appropriate milestone and project boards

Goal

Getting the latest version from Coroutines including the new features and bug fixes.

Highlights 🚀

• StateFlow, SharedFlow and corresponding operators are promoted to stable API (#2316).

Implementation

Bumping coroutinesAndroid version to 1.4.0 in dependencies.gradle

Testing

• I have tested locally (including SNAPSHOT upstream dependencies if needed) through testapp/demo app and run all activities to avoid regressions
• I have tested via a test drive, or a simulation/mock location app
• New and existing unit tests pass locally with my changes

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have updated the CHANGELOG including this PR
• We might need to update / push api/current.txt files after running $> make core-update-api (Core) / $> make ui-update-api (UI) if there are changes / errors we're 🆗 with (e.g. AddedMethod changes are marked as errors but don't break SemVer) 🚀 If there are SemVer breaking changes add the SEMVER label. See Metalava docs

cc @mapbox/navigation-android

[Guardiola31337]

Dropping the official blog post for posterity https://blog.jetbrains.com/kotlin/2020/10/kotlinx-coroutines-1-4-0-introducing-stateflow-and-sharedflow/ 🎉