Core provisioner logic for PawletOS Android 16:
- BootReceiver: trigger provisioning on BOOT_COMPLETED and USER_PRESENT
- ProvisioningService: run base tasks (APN, secure settings) and OTA tasks
(deferred APK installs) as separate passes
- VendorConfig: read vendor.cfg from partition; parse APNs, packages, settings
- Android.bp: wire up AIDL, disable resource generation (no UI)