address review feedback

Signed-off-by: Xin Li <xin@hashgraph.com>

Author: xin-hedera

common/src/main/java/org/hiero/mirror/common/util/DomainUtils.java

@@ -341,8 +341,8 @@ public static byte[] trim(final byte[] data) {
     }
 
     public static ByteString trim(final ByteString data) {
-        if (data == null) {
-            return null;
+        if (data == null || data.isEmpty() || data.byteAt(0) != 0) {
+            return data;
         }
 
         final byte[] value = DomainUtils.toBytes(data);

common/src/test/java/org/hiero/mirror/common/util/DomainUtilsTest.java

@@ -44,7 +44,7 @@
 import org.junit.jupiter.params.provider.NullAndEmptySource;
 import org.junit.jupiter.params.provider.ValueSource;
 
-class DomainUtilsTest {
+final class DomainUtilsTest {
 
     private static final String ED25519_KEY = "60beee88a761e079f71b03b5fe041979369e96450a7455b203a2578c8a7d4852";
     private static final String ECDSA_384_KEY = "0000001365636473612d736861322d6e69737470333834000000086e697374703338"

importer/src/test/java/org/hiero/mirror/importer/parser/domain/BlockTransactionBuilder.java

@@ -885,7 +885,7 @@ private ByteString getEvmAddress(ContractID contractId) {
     }
 
     private ByteString leftPad(ByteString value) {
-        if (random.nextInt() % 2 == 0) {
+        if (random.nextBoolean()) {
             return value;
         }