Add KeyRingProtectionSettings.secureDefaultSettings() factory method

pgpainless-core/src/main/java/org/pgpainless/key/protection/KeyRingProtectionSettings.java

@@ -39,6 +39,10 @@ public class KeyRingProtectionSettings {
         this.s2kCount = s2kCount;
     }
 
+    public static KeyRingProtectionSettings secureDefaultSettings() {
+        return new KeyRingProtectionSettings(SymmetricKeyAlgorithm.AES_256);
+    }
+
     public @Nonnull SymmetricKeyAlgorithm getEncryptionAlgorithm() {
         return encryptionAlgorithm;
     }

pgpainless-core/src/main/java/org/pgpainless/key/protection/PasswordBasedSecretKeyRingProtector.java

@@ -54,7 +54,7 @@ public class PasswordBasedSecretKeyRingProtector implements SecretKeyRingProtect
     }
 
     public static PasswordBasedSecretKeyRingProtector forKey(PGPKeyRing keyRing, Passphrase passphrase) {
-        KeyRingProtectionSettings protectionSettings = new KeyRingProtectionSettings(SymmetricKeyAlgorithm.AES_256);
+        KeyRingProtectionSettings protectionSettings = KeyRingProtectionSettings.secureDefaultSettings();
         SecretKeyPassphraseProvider passphraseProvider = new SecretKeyPassphraseProvider() {
             @Override
             @Nullable

pgpainless-core/src/test/java/org/pgpainless/key/protection/PassphraseProtectedKeyTest.java

@@ -32,7 +32,7 @@ public class PassphraseProtectedKeyTest {
      * Protector that holds only the password of cryptie.
      */
     private final PasswordBasedSecretKeyRingProtector protector = new PasswordBasedSecretKeyRingProtector(
-            new KeyRingProtectionSettings(SymmetricKeyAlgorithm.AES_256),
+            KeyRingProtectionSettings.secureDefaultSettings(),
             new SecretKeyPassphraseProvider() {
                 @Nullable
                 @Override