Add quick restore flow and DebugLoggableModel to regV5.

Renames restore → quickrestore package, adds QuickRestoreQrViewModel,
introduces DebugLoggableModel for safe toString in release builds,
updates all State/Events classes to extend it, switches previews to
AllDevicePreviews, and enables BuildConfig for the registration module.

demo/registration/src/main/AndroidManifest.xml

@@ -2,6 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
   <uses-permission android:name="android.permission.INTERNET" />
+  <uses-permission android:name="android.permission.CAMERA" />
 
   <application
     android:name=".RegistrationApplication"