Android Extensions: Explicitly check if the Android plugin is enabled (EA-104651)

AndroidGradleOrderEnumerationHandler is defined in gradle.xml that doesn't depend on the Android plugin.
So we need to additionally check if the Android plugin is installed/enabled.

idea/idea-android/src/org/jetbrains/kotlin/android/AndroidGradleOrderEnumerationHandler.kt

@@ -13,9 +13,9 @@ import com.intellij.openapi.module.ModuleManager
 import com.intellij.openapi.roots.ModuleRootModel
 import com.intellij.openapi.roots.OrderRootType
 import com.intellij.openapi.vfs.VfsUtilCore
-import org.jetbrains.android.facet.AndroidFacet
 import org.jetbrains.kotlin.config.KotlinFacetSettingsProvider
 import org.jetbrains.kotlin.config.TargetPlatformKind
+import org.jetbrains.kotlin.idea.core.isAndroidModule
 import org.jetbrains.kotlin.idea.facet.KotlinFacet
 import org.jetbrains.plugins.gradle.execution.GradleOrderEnumeratorHandler
 import org.jetbrains.plugins.gradle.model.ExternalSourceDirectorySet
@@ -49,7 +49,6 @@ class AndroidGradleOrderEnumerationHandler(module: Module) : GradleOrderEnumerat
         KotlinFacet.get(rootModel.module) ?: return false
 
         val module = rootModel.module
-        fun Module.isAndroidModule() = AndroidFacet.getInstance(this) != null
 
         // The current module has to be an ordinary Java module, but the code below is for Android projects
         if (module.isAndroidModule() || ModuleManager.getInstance(module.project).modules.none { it.isAndroidModule() }) {

idea/idea-core/src/org/jetbrains/kotlin/idea/core/moduleUtils.kt

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. 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.idea.core
+
+import com.intellij.facet.FacetManager
+import com.intellij.openapi.module.Module
+
+fun Module.isAndroidModule(): Boolean {
+    val facets = FacetManager.getInstance(this).allFacets
+    return facets.any { it.javaClass.simpleName == "AndroidFacet" }
+}