Fix conversion of assignment as expression in J2K

Blockless if's and so with assignment as expression inside
should turn into blockful
 #KT-16816 fixed

j2k/testData/fileOrElement/doWhileStatement/whileWithAssignmentAsExpression.java

@@ -0,0 +1,7 @@
+public class SomeClass {
+    int a;
+    int b;
+    void doSomeWhile(int i) {
+        do a = b = i; while (i < 0)
+    }
+}

j2k/testData/fileOrElement/doWhileStatement/whileWithAssignmentAsExpression.kt

@@ -0,0 +1,10 @@
+class SomeClass {
+    internal var a: Int = 0
+    internal var b: Int = 0
+    internal fun doSomeWhile(i: Int) {
+        do {
+            b = i
+            a = b
+        } while (i < 0)
+    }
+}

j2k/testData/fileOrElement/for/assignmentAsExpressionInBody.java

@@ -0,0 +1,7 @@
+public class SomeClass {
+    void doSomeFor() {
+        int a,b;
+        for (int i = 0; i < 10; i++)
+            a = b = i;
+    }
+}

j2k/testData/fileOrElement/for/assignmentAsExpressionInBody.kt

@@ -0,0 +1,10 @@
+class SomeClass {
+    internal fun doSomeFor() {
+        var a: Int
+        var b: Int
+        for (i in 0..9) {
+            b = i
+            a = b
+        }
+    }
+}

j2k/testData/fileOrElement/ifStatement/assignmentAsExpressionInIf.java

@@ -0,0 +1,9 @@
+public class SomeClass {
+    void doSomeIf(int i) {
+        int a,b,c
+        if (i < 0)
+            a = b = i;
+        else
+            b = c = i;
+    }
+}

j2k/testData/fileOrElement/ifStatement/assignmentAsExpressionInIf.kt

@@ -0,0 +1,14 @@
+class SomeClass {
+    internal fun doSomeIf(i: Int) {
+        val a: Int
+        val b: Int
+        val c: Int
+        if (i < 0) {
+            b = i
+            a = b
+        } else {
+            c = i
+            b = c
+        }
+    }
+}

j2k/testData/fileOrElement/whileStatement/whileWithAssignmentAsExpression.java

@@ -0,0 +1,8 @@
+public class SomeClass {
+    int a;
+    int b;
+    void doSomeWhile(int i) {
+        while (i < 0)
+            a = b = i;
+    }
+}

j2k/testData/fileOrElement/whileStatement/whileWithAssignmentAsExpression.kt

@@ -0,0 +1,10 @@
+class SomeClass {
+    internal var a: Int = 0
+    internal var b: Int = 0
+    internal fun doSomeWhile(i: Int) {
+        while (i < 0) {
+            b = i
+            a = b
+        }
+    }
+}