IDEA-69604 Complete Current Statement: correct processing for code blocks with empty line

Update caret position without new empty line creation if code block already starts by new line

java/java-tests/testData/codeInsight/completeStatement/NoUnnecessaryEmptyLineAtCodeBlock_after.java

@@ -0,0 +1,7 @@
+public class Foo {
+    void test(int i) {
+        if (i > 0) {
+            <caret>
+        }
+    }
+}