fix(java): Fix header offset issue in MetaStringBytes hashcode (#1668)

## What does this PR do?

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MetaStringBytes `hashcode & 0xff`, that is, header, represents the
encoding

## Related issues

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- #xxxx1
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## Does this PR introduce any user-facing change?

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- [ ] Does this PR introduce any public API change?
- [ ] Does this PR introduce any binary protocol compatibility change?


## Benchmark

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---------

Signed-off-by: LiangliangSui <coolsui.coding@gmail.com>

java/fury-core/src/main/java/org/apache/fury/resolver/MetaStringBytes.java

@@ -28,6 +28,7 @@
 @Internal
 final class MetaStringBytes {
   static final short DEFAULT_DYNAMIC_WRITE_STRING_ID = -1;
+  private static final int HEADER_MASK = 0xff;
 
   final byte[] bytes;
   final long hashCode;
@@ -55,7 +56,7 @@ public MetaStringBytes(MetaString metaString) {
       hashCode += 256; // last byte is reserved for header.
     }
     hashCode &= 0xffffffffffffff00L;
-    int header = metaString.getEncoding().getValue();
+    int header = metaString.getEncoding().getValue() & HEADER_MASK;
     this.hashCode = hashCode | header;
   }
 
@@ -64,9 +65,8 @@ public String decode(char specialChar1, char specialChar2) {
   }
 
   public String decode(MetaStringDecoder decoder) {
-    int header = (int) (hashCode & 0xff);
-    int encodingFlags = header & 0b111;
-    MetaString.Encoding encoding = MetaString.Encoding.values()[encodingFlags];
+    int header = (int) (hashCode & HEADER_MASK);
+    MetaString.Encoding encoding = MetaString.Encoding.values()[header];
     return decoder.decode(bytes, encoding);
   }