Approximate projections in SAM type when creating SAM adapter

Use the same approach as Java 8 applies to function types
(see non-wildcard parametrization in §9.9 of JLS)

 #KT-6918 Fixed

core/descriptors/src/org/jetbrains/kotlin/types/TypeUtils.kt

@@ -144,3 +144,6 @@ fun KotlinType.getImmediateSuperclassNotAny(): KotlinType? {
         TypeUtils.createSubstitutedSupertype(this, it, TypeSubstitutor.create(this))
     }
 }
+
+fun KotlinType.asTypeProjection(): TypeProjection = TypeProjectionImpl(this)
+fun KotlinType.containsSpecialType(predicate: (KotlinType) -> Boolean) = TypeUtils.containsSpecialType(this, predicate)