Fix cookie error on old Android

app/src/main/java/com/hippo/ehviewer/EhApplication.java

@@ -18,6 +18,8 @@ package com.hippo.ehviewer;
 
 import android.app.ActivityManager;
 import android.content.Context;
+import android.os.Build;
+import android.webkit.CookieSyncManager;
 
 import com.hippo.conaco.Conaco;
 import com.hippo.ehviewer.network.EhOkHttpClient;
@@ -38,6 +40,10 @@ public class EhApplication extends SceneApplication {
 
         Config.initialize(this);
 
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
+            CookieSyncManager.createInstance(this);
+        }
+
         Conaco.Builder conacoBuilder = new Conaco.Builder();
         conacoBuilder.hasMemoryCache = true;
         conacoBuilder.memoryCacheMaxSize = getMemoryCacheMaxSize();