Add import tracker

This tracker reports import directives to IJ's JPS to track changes and detectwehen it is needed to adjust compilation scope.

#KT-44835 Fixed

build-common/src/org/jetbrains/kotlin/incremental/ImportTrackerImpl.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2023 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.incremental
+
+import org.jetbrains.kotlin.incremental.components.ImportTracker
+import java.util.concurrent.ConcurrentHashMap
+
+@Suppress("unused")
+class ImportTrackerImpl: ImportTracker {
+    private val filePathToImportedFqNames = ConcurrentHashMap<String, MutableSet<String>>()
+
+    val filePathToImportedFqNamesMap: Map<String, Collection<String>>
+        get() = filePathToImportedFqNames
+
+    override fun report(filePath: String, importedFqName: String) {
+        filePathToImportedFqNames.getOrPut(filePath) { hashSetOf() }.add(importedFqName)
+    }
+}