[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/TryNormal9.txt

@@ -0,0 +1,31 @@
+PsiJavaFile:TryNormal9.java
+  PsiTryStatement
+    PsiKeyword:try('try')
+    PsiResourceList:(r1; R r2 = 0)
+      PsiJavaToken:LPARENTH('(')
+      PsiResourceExpression
+        PsiReferenceExpression:r1
+          PsiReferenceParameterList
+            <empty list>
+          PsiIdentifier:r1('r1')
+      PsiJavaToken:SEMICOLON(';')
+      PsiWhiteSpace(' ')
+      PsiResourceVariable:r2
+        PsiModifierList:
+          <empty list>
+        PsiTypeElement:R
+          PsiJavaCodeReferenceElement:R
+            PsiIdentifier:R('R')
+            PsiReferenceParameterList
+              <empty list>
+        PsiWhiteSpace(' ')
+        PsiIdentifier:r2('r2')
+        PsiWhiteSpace(' ')
+        PsiJavaToken:EQ('=')
+        PsiWhiteSpace(' ')
+        PsiLiteralExpression:0
+          PsiJavaToken:INTEGER_LITERAL('0')
+      PsiJavaToken:RPARENTH(')')
+    PsiCodeBlock
+      PsiJavaToken:LBRACE('{')
+      PsiJavaToken:RBRACE('}')