Feat: [default-algo] Change default algo to aes.

-- Change default algo to aes.

Log: add feature
Task: https://pms.uniontech.com/task-view-384955.html

Author: GongHeng2017

assets/configs/org.deepin.dde.file-manager.diskencrypt.json

@@ -14,7 +14,7 @@
             "visibility":"public"
         },
         "encryptAlgorithm" : {
-            "value": "sm4",
+            "value": "aes",
             "serial":0,
             "flags":["global"],
             "name":"Encrypt algorithm",

src/dde-file-manager/dfmplugin-disk-encrypt-entry/utils/encryptutils.cpp

@@ -44,10 +44,10 @@ QString config_utils::cipherType()
     auto cfg = Dtk::Core::DConfig::create("org.deepin.dde.file-manager",
                                           "org.deepin.dde.file-manager.diskencrypt");
     cfg->deleteLater();
-    auto cipher = cfg->value("encryptAlgorithm", "sm4").toString();
+    auto cipher = cfg->value("encryptAlgorithm", "aes").toString();
     QStringList supportedCipher { "sm4", "aes" };
     if (!supportedCipher.contains(cipher))
-        return "sm4";
+        return "aes";
     return cipher;
 }