Separate PINs from Registration Lock.

You can now have a PIN without having registration lock.

Note: We still need to change the registration flow to allow non-reglock
users to enter their PIN.

app/src/main/java/org/thoughtcrime/securesms/dependencies/ApplicationDependencies.java

@@ -73,8 +73,8 @@ public class ApplicationDependencies {
 
   public static synchronized @NonNull KeyBackupService getKeyBackupService() {
     return getSignalServiceAccountManager().getKeyBackupService(IasKeyStore.getIasKeyStore(application),
-                                                                BuildConfig.KEY_BACKUP_ENCLAVE_NAME,
-                                                                BuildConfig.KEY_BACKUP_MRENCLAVE,
+                                                                BuildConfig.KBS_ENCLAVE_NAME,
+                                                                BuildConfig.KBS_MRENCLAVE,
                                                                 10);
   }