Add query dynamic indexable data to SettingsSearchIndexablesProvider

- Add getDynamicSearchIndexableRawFromProvider method.
- Extract the injection indexable part to the
  getInjectionIndexableRawData method.
- Extract the getting indexable provider part to the
  getIndexableProviderValues method.

Test: manual
Fixes: 143741131
Change-Id: Idbf5b5419c0b78e0586e9c8d611dd51013eb0971