Kapt: Generic arguments in anonymous type should always be mapped to boxed types (KT-19750)

plugins/kapt3/testData/converter/kt19750.kt

@@ -0,0 +1,11 @@
+package test
+
+class Test<T : CharSequence, N : Number> {
+    private val x = object : TypedListUpdateCallback<String, Long> {
+        override fun onInserted(position: Long, count: Long, item: String) {}
+    }
+}
+
+interface TypedListUpdateCallback<T : Any, C : Number> {
+    fun onInserted(position: C, count: C, item: T)
+}

plugins/kapt3/testData/converter/kt19750.txt

@@ -0,0 +1,23 @@
+package test;
+
+@kotlin.Metadata()
+public final class Test<T extends java.lang.CharSequence, N extends java.lang.Number> {
+    private final test.TypedListUpdateCallback<java.lang.String, java.lang.Long> x = null;
+
+    public Test() {
+        super();
+    }
+}
+
+////////////////////
+
+package test;
+
+@kotlin.Metadata()
+public abstract interface TypedListUpdateCallback<T extends java.lang.Object, C extends java.lang.Number> {
+
+    public abstract void onInserted(@org.jetbrains.annotations.NotNull()
+    C position, @org.jetbrains.annotations.NotNull()
+    C count, @org.jetbrains.annotations.NotNull()
+    T item);
+}