KT-14400: Properly handle TypeAliasConstructorDescriptor in KotlinTypeMapper.mapToCallableMethod(...)

Implement getDefaultType() in TypeAliasDescriptor subclasses.

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/NotFoundClasses.kt

@@ -133,6 +133,8 @@ class NotFoundClasses(private val storageManager: StorageManager, private val mo
             get() = builtIns.nullableAnyType
         override val expandedType: SimpleType
             get() = builtIns.nullableAnyType
+        override fun getDefaultType(): SimpleType =
+                builtIns.nullableAnyType
 
         override fun substitute(substitutor: TypeSubstitutor) = this
 

core/deserialization/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedMemberDescriptor.kt

@@ -155,6 +155,7 @@ class DeserializedTypeAliasDescriptor(
     override lateinit var underlyingType: SimpleType private set
     override lateinit var expandedType: SimpleType private set
     private lateinit var typeConstructorParameters: List<TypeParameterDescriptor>
+    private lateinit var defaultTypeImpl: SimpleType private set
 
     fun initialize(
             declaredTypeParameters: List<TypeParameterDescriptor>,
@@ -165,8 +166,12 @@ class DeserializedTypeAliasDescriptor(
         this.underlyingType = underlyingType
         this.expandedType = expandedType
         typeConstructorParameters = computeConstructorTypeParameters()
+        defaultTypeImpl = computeDefaultType()
     }
 
+    override fun getDefaultType(): SimpleType =
+            defaultTypeImpl
+
     override fun substitute(substitutor: TypeSubstitutor): TypeAliasDescriptor {
         if (substitutor.isEmpty) return this
         val substituted = DeserializedTypeAliasDescriptor(containingDeclaration, annotations, name, visibility, proto, nameResolver, typeTable, containerSource)