ensure the highlight SDK is compatible with java 11 (highlight#7051)

## Summary

Ensure the Java SDK is comparible with Java 11 per customer request.

## How did you test this change?

CI testing

## Are there any deployment considerations?

Will be tagging and releasing a new SDK version.

## Does this work require review from our design team?

No

sdk/highlight-java/highlight-common/src/main/java/io/highlight/sdk/common/HighlightHeader.java

@@ -1,14 +1,51 @@
 package io.highlight.sdk.common;
 
-public record HighlightHeader(String sessionId, String requestId) {
+public final class HighlightHeader {
 
-	public static final String X_HIGHLIGHT_REQUEST = "x-highlight-request";
+    public static final String X_HIGHLIGHT_REQUEST = "x-highlight-request";
+    private final String sessionId;
+    private final String requestId;
+
+    public HighlightHeader(String sessionId, String requestId) {
+        this.sessionId = sessionId;
+        this.requestId = requestId;
+    }
+
+    public static HighlightHeader parse(String header) {
+        String[] split = header.split("/");
+        if (split.length == 2) {
+            return new HighlightHeader(split[0], split[1]);
+        }
+        return null;
+    }
+
+    public String sessionId() {
+        return sessionId;
+    }
+
+    public String requestId() {
+        return requestId;
+    }
+
+    @java.lang.Override
+    public boolean equals(java.lang.Object obj) {
+        if (obj == this) return true;
+        if (obj == null || obj.getClass() != this.getClass()) return false;
+        var that = (HighlightHeader) obj;
+        return java.util.Objects.equals(this.sessionId, that.sessionId) &&
+                java.util.Objects.equals(this.requestId, that.requestId);
+    }
+
+    @java.lang.Override
+    public int hashCode() {
+        return java.util.Objects.hash(sessionId, requestId);
+    }
+
+    @java.lang.Override
+    public String toString() {
+        return "HighlightHeader[" +
+                "sessionId=" + sessionId + ", " +
+                "requestId=" + requestId + ']';
+    }
 
-	public static HighlightHeader parse(String header) {
-		String[] split = header.split("/");
-		if (split.length == 2) {
-			return new HighlightHeader(split[0], split[1]);
-		}
-		return null;
-	}
 }