refactor: extract applicationScope from AnkiDroidApp to :common:android

[criticalAY]

Purpose / Description

Again one step forward to clean and organised code, extracting applicationScope from AnkiDroidApp

Fixes

• Fixes part of Architecture Discussion: Module Extraction #20737

Approach

See commit

How Has This Been Tested?

Local build and tests pass

Learning (optional, can help others)

NA

Checklist

Please, go through these checks before submitting the PR.

• You have a descriptive commit message with a short title (first line, max 50 chars).
• You have commented your code, particularly in hard-to-understand areas
• You have performed a self-review of your own code
• UI changes: include screenshots of all affected screens (in particular showing any new or changed strings)
• UI Changes: You have tested your change using the Google Accessibility Scanner

[BrayanDSO]

for the future (not related to this PR), maybe ProcessLifecycleOwner.get().lifecycleScope should be used for this goal

[david-allison]

Solid, thanks!!