[FIR] Move Jsr305State from FirSession to separate component

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/enhancement/FirJsr305StateContainer.kt

@@ -0,0 +1,18 @@
+/*
+ * 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.java.enhancement
+
+import org.jetbrains.kotlin.fir.FirSession
+import org.jetbrains.kotlin.fir.FirSessionComponent
+import org.jetbrains.kotlin.utils.Jsr305State
+
+class FirJsr305StateContainer(val jsr305State: Jsr305State) : FirSessionComponent {
+    companion object {
+        val Default: FirJsr305StateContainer = FirJsr305StateContainer(Jsr305State.DEFAULT)
+    }
+}
+
+val FirSession.jsr305StateContainer: FirJsr305StateContainer by FirSession.sessionComponentAccessor()

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/enhancement/SignatureEnhancement.kt

@@ -47,7 +47,7 @@ class FirSignatureEnhancement(
     private val javaTypeParameterStack: JavaTypeParameterStack =
         if (owner is FirJavaClass) owner.javaTypeParameterStack else JavaTypeParameterStack.EMPTY
 
-    private val jsr305State: Jsr305State = session.jsr305State ?: Jsr305State.DEFAULT
+    private val jsr305State: Jsr305State = session.jsr305StateContainer.jsr305State
 
     private val typeQualifierResolver = FirAnnotationTypeQualifierResolver(session, jsr305State)