replace base32 parsing algorithm to fix issue with some TOTP entries using KeePass2 style

fixes #2020
fixes #2246

src/keepass2android/Totp/Keepass2TotpPluginAdapter.cs

@@ -5,6 +5,7 @@ using keepass2android;
 using KeePassLib;
 using KeePassLib.Cryptography;
 using KeePassLib.Utility;
+using KeeTrayTOTP.Libraries;
 
 namespace PluginTOTP
 {
@@ -66,7 +67,7 @@ namespace PluginTOTP
 
                 entryFields.TryGetValue(strPrefix + "Secret-Base32", out str);
                 if (!string.IsNullOrEmpty(str))
-                    return MemUtil.ParseBase32(str);
+                    return Base32.Decode(str); 
                    
                 entryFields.TryGetValue(strPrefix + "Secret-Base64", out str);
                 if (!string.IsNullOrEmpty(str))