chore: added clearServiceEndpoint method

Signed-off-by: Manish Dait <daitmanish88@gmail.com>

Author: manishdait

sdk/src/main/java/com/hedera/hashgraph/sdk/NodeUpdateTransaction.java

@@ -319,6 +319,16 @@ public NodeUpdateTransaction addServiceEndpoint(Endpoint serviceEndpoint) {
         return this;
     }
 
+    /**
+     * Clear serviceEndpoint lists.
+     * @return {@code this}
+     */
+    public NodeUpdateTransaction clearServiceEndpoint() {
+        requireNotFrozen();
+        serviceEndpoints.clear();
+        return this;
+    }
+
     /**
      * Extract the certificate used to sign gossip events.
      * @return the DER encoding of the certificate presented.