java completion: suggest ref[0] in basic completion as we do in smart one (towards IDEA-145958)

GitOrigin-RevId: 26c336f486c3e7c8a94bee43df52d559821807f9

java/java-tests/testData/codeInsight/completion/normal/OneElementArray.java

@@ -0,0 +1,8 @@
+public class SomeClass {
+
+  {
+    int[] aaa = new int[1];
+    int bbb = a<caret>
+  }
+
+}

java/java-tests/testData/codeInsight/completion/normal/OneElementArray_after.java

@@ -0,0 +1,8 @@
+public class SomeClass {
+
+  {
+    int[] aaa = new int[1];
+    int bbb = aaa[0]<caret>
+  }
+
+}