[java] [javadoc snippet] fix injection with unclear context

use existing JShell wrappers

GitOrigin-RevId: 2e0351145e1e3f750d781cd62bcda20cc49693c7

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/javaDoc/SnippetMethod.java

@@ -1,5 +1,5 @@
 /** {<warning descr="'@snippet' tag is not available at this language level">@snippet</warning> :
- * void f<error descr="';' expected">(</error><error descr="Expression expected">)</error> {}
+ * void f() {}
  * }
  */
 class A {