fix(datastore): Update network connection availability checking status logic in ReachabilityMonitor of Datastore

[aladine]

• PR title and description conform to Pull Request guidelines.

Issue #, if available:
#2738

Description of changes:
Enhance the capability to detect network connection availabilities in syncengine of aws datastore. This includes:

• Instead of checking activeNetwork, connectivity provider could retrieve getNetworkCapabilities and check the network capability is valid.
• Network callback should have an extra onCapabilitiesChanged(). Since amplify-android supports API 23 and above, onCapabilitiesChanged should be called immediately after onAvailable callback and contains accurate information to determine network connection type.
• A more fine grained detail to support different Android SDK version for network checking.

How did you test these changes?
(Please add a line here how the changes were tested)
Add unit test to verify the new change

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[tylerjroach]

Hi @aladine, thank you for your contribution submission. We will prioritize reviewing this PR and reply back!

[aladine]

Any update in this pull request?

[tylerjroach]

Hi @aladine, sorry for the delay. I will try and provide some feedback within next few days and suggest any updates if needed.

[aladine]

No problem, I am happy to answer all the questions or concerns for this pull request.

[mattcreaser]

Looks good to me! Only some minor stylistic things to clean up.

[tylerjroach]

Overall changes look good. Can you take a look at an alternate implementation here: https://github.com/aws-amplify/amplify-android/tree/tjroach/improve-network-detection-datastore

I attempted to take in Matt's suggestions and simplify it a bit. I believe the code functions identically to yours. The tests would just need updated to use MockK

[aladine]

Overall changes look good. Can you take a look at an alternate implementation here: https://github.com/aws-amplify/amplify-android/tree/tjroach/improve-network-detection-datastore

I attempted to take in Matt's suggestions and simplify it a bit. I believe the code functions identically to yours. The tests would just need updated to use MockK

Thanks Tyler, I move the codes from NetworkUtil to extensions folder as your branch. Update test location and mock method also.