Add platform/impl soft keywords, add isPlatform/isImpl to MemberDescriptor

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/lazy/descriptors/LazyJavaClassDescriptor.kt

@@ -95,6 +95,9 @@ class LazyJavaClassDescriptor(
 
     override fun isInner() = isInner
     override fun isData() = false
+    override fun isCompanionObject() = false
+    override fun isPlatform() = false
+    override fun isImpl() = false
 
     private val typeConstructor = c.storageManager.createLazyValue { LazyJavaClassTypeConstructor() }
     override fun getTypeConstructor(): TypeConstructor = typeConstructor()
@@ -132,8 +135,6 @@ class LazyJavaClassDescriptor(
 
     override fun getFunctionTypeForSamInterface(): SimpleType? = functionTypeForSamInterface()
 
-    override fun isCompanionObject() = false
-
     override fun toString() = "Lazy Java class ${this.fqNameUnsafe}"
 
     private inner class LazyJavaClassTypeConstructor : AbstractClassTypeConstructor(c.storageManager) {