Fix an issue where backups where enabled when exporting the vault

This is really stupid.

app/src/main/java/com/beemdevelopment/aegis/ui/PreferencesFragment.java

@@ -460,6 +460,7 @@ public class PreferencesFragment extends PreferenceFragmentCompat {
                 // intentional fallthrough
             case CODE_EXPORT_ENCRYPT:
                 onExportResult(resultCode, data, requestCode == CODE_EXPORT_ENCRYPT);
+                break;
             case CODE_BACKUPS:
                 onSelectBackupsLocationResult(resultCode, data);
                 break;