* [Android] Register Brave as Android AutofillService for address autofill Re-enables the Android AutofillService that was removed in https://github.com/brave/brave-core/pull/25759 due to crashes on split-APK installs. Uses the SplitCompat pattern (SplitCompatAutofillService base class) so the service works correctly when installed from the Play Store. When the user selects Brave as their autofill provider in Android Settings, Brave can fill saved address profiles into third-party apps and save new addresses from manually filled forms. Resolves: https://github.com/brave/brave-browser/issues/41334