Add Lock Delay(#276) (#278)

* Add Lock Delay(#276)

* Remove zh-TW translation

* Use SeekBarPreference instead of SimpleMenuPreference

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

@@ -90,6 +90,7 @@ public class Settings {
      ********************/
     public static final String KEY_SAVE_PARSE_ERROR_BODY = "save_parse_error_body";
     public static final String KEY_SECURITY = "require_unlock";
+    public static final String KEY_SECURITY_DELAY = "require_unlock_delay";
     public static final String DEFAULT_SECURITY = "";
     public static final String KEY_ENABLE_FINGERPRINT = "enable_fingerprint";
     public static final String KEY_READ_CACHE_SIZE = "read_cache_size";
@@ -1063,6 +1064,9 @@ public class Settings {
     public static void putSecurity(boolean value) {
         putBoolean(KEY_SECURITY, value);
     }
+    public static int getSecurityDelay() {
+        return getInt(KEY_SECURITY_DELAY, 0);
+    }
 
     public static boolean getEnableFingerprint() {
         return getBoolean(KEY_ENABLE_FINGERPRINT, true);