feat: fix checkstyle issues

Author: sailok.chinta

src/main/java/com/thealgorithms/datastructures/trees/Trie.java

@@ -10,7 +10,7 @@ class TrieNode {
     HashMap<Character, TrieNode> child;
     boolean end;
 
-    public TrieNode(char value) {
+    TrieNode(char value) {
         this.value = value;
         this.child = new HashMap<>();
         this.end = false;

src/test/java/com/thealgorithms/datastructures/trees/TrieTest.java

@@ -1,6 +1,8 @@
 package com.thealgorithms.datastructures.trees;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
 
 import java.util.List;
 import org.junit.jupiter.api.Test;