More onboarding screen additions 2: Electric Boogaloo

(cherry picked from commit f7c5b4243533374f6751055fd4bc037e022db8a8)

# Conflicts:
#	app/build.gradle.kts

domain/src/main/java/tachiyomi/domain/storage/service/StoragePreferences.kt

@@ -1,5 +1,6 @@
 package tachiyomi.domain.storage.service
 
+import tachiyomi.core.preference.Preference
 import tachiyomi.core.preference.PreferenceStore
 import tachiyomi.core.storage.FolderProvider
 
@@ -8,5 +9,5 @@ class StoragePreferences(
     private val preferenceStore: PreferenceStore,
 ) {
 
-    fun baseStorageDirectory() = preferenceStore.getString("storage_dir", folderProvider.path())
+    fun baseStorageDirectory() = preferenceStore.getString(Preference.appStateKey("storage_dir"), folderProvider.path())
 }