Format as public/private; follow refactoring.

Offer to format an empty disk as public/private.

Bug: 19993667
Change-Id: I69fafaed524f3ef5e65d04a9e3a94789fcfc3087
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index ba08036..88c8316 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -33,7 +33,8 @@
     public static class VpnSettingsActivity extends SettingsActivity { /* empty */ }
     public static class DateTimeSettingsActivity extends SettingsActivity { /* empty */ }
     public static class StorageSettingsActivity extends SettingsActivity { /* empty */ }
-    public static class StorageVolumeSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class PublicVolumeSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class PrivateVolumeForgetActivity extends SettingsActivity { /* empty */ }
     public static class WifiSettingsActivity extends SettingsActivity { /* empty */ }
     public static class WifiP2pSettingsActivity extends SettingsActivity { /* empty */ }
     public static class InputMethodAndLanguageSettingsActivity extends SettingsActivity { /* empty */ }