[java] adds support for Java 9's improved try-with-resources (IDEA-140266)

PSI, parser, highlighting, exception analysis, control flow, completion.

java/java-tests/testData/psi/parser-partial/statements/TryNormal7.txt

@@ -0,0 +1,14 @@
+PsiJavaFile:TryNormal7.java
+  PsiTryStatement
+    PsiKeyword:try('try')
+    PsiResourceList:(r)
+      PsiJavaToken:LPARENTH('(')
+      PsiResourceExpression
+        PsiReferenceExpression:r
+          PsiReferenceParameterList
+            <empty list>
+          PsiIdentifier:r('r')
+      PsiJavaToken:RPARENTH(')')
+    PsiCodeBlock
+      PsiJavaToken:LBRACE('{')
+      PsiJavaToken:RBRACE('}')