[FIR] Extract java related effective visibility calculation to platform component

compiler/fir/jvm/src/org/jetbrains/kotlin/fir/FirJvmEffectiveVisibilityResolver.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.fir
+
+import org.jetbrains.kotlin.fir.symbols.impl.FirClassLikeSymbol
+
+class FirJvmEffectiveVisibilityResolver(session: FirSession) : FirEffectiveVisibilityResolverImpl(session) {
+    override fun computeEffectiveVisibility(visibility: Visibility, containerSymbol: FirClassLikeSymbol<*>?): FirEffectiveVisibility {
+        return when (visibility) {
+            JavaVisibilities.PackageVisibility -> FirEffectiveVisibilityImpl.PackagePrivate
+            else -> super.computeEffectiveVisibility(visibility, containerSymbol)
+        }
+    }
+}
+
+fun FirSession.registerJvmEffectiveVisibilityResolver() {
+    register(FirEffectiveVisibilityResolver::class, FirJvmEffectiveVisibilityResolver(this))
+}