[Improvement][code style] Add sign next line automatic assigner (#3522)

style/intellij-java-code-style.xml

@@ -95,4 +95,7 @@
     <option name="JD_KEEP_EMPTY_EXCEPTION" value="false" />
     <option name="JD_KEEP_EMPTY_RETURN" value="false" />
   </JavaCodeStyleSettings>
+  <codeStyleSettings language="JAVA">
+    <option name="BINARY_OPERATION_SIGN_ON_NEXT_LINE" value="true" />
+  </codeStyleSettings>
 </code_scheme>