java: consider deepest qualifier for auto-import on completion (IDEA-230624)

GitOrigin-RevId: 8cb006428a6f92a929b6d916fbea26a95d293a0e

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

@@ -0,0 +1,5 @@
+class C {
+  {
+    new Oute<caret>
+  }
+}

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

@@ -0,0 +1,7 @@
+import p.Outer;
+
+class C {
+  {
+    new Outer.Inner()<caret>
+  }
+}