Align wpandroid to fluxc di changes

[develric]

This PR aligns WPAndroid to the latest changes related to DI cleanup introduced with this PR.

I mimic the changes done in a similar alignment in Woo here.

I'm targeting the feature/sync-explat-updates branch since current state of FluxC requires that branch to be merged too.

I think that once approved we can:

• Merge this one into the ExPlat: Sync implementation with latest updates from FluxC #14498 keeping the fluxc hash 9621372056be33c1a9c28278a192f56c07339786
• Review and approve the ExPlat: Sync implementation with latest updates from FluxC #14498
• Once approved we can create a new fluxc tag (I think there were already additional PRs merged into develop after the 1.16.0-beta-1 was created, so we need to create a fresh one)
• Update the ExPlat: Sync implementation with latest updates from FluxC #14498 with the newly created fluxc tag and merge

and hopefully we should be ok I think.

To test:

Check the app builds and smoke test.

Regression Notes

1. Potential unintended areas of impact
   None in theory 😄 .

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Smoke testing and already available CI.

3. What automated tests I added (or what prevented me from doing so)
   Current CI should be covering already.

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading the APK here.

[planarvoid]

LGTM