Decouple license resolver from bundle task name. (#460)

Instead rely on the type of the task.

Author: vkryachko

buildSrc/src/main/groovy/com/google/firebase/gradle/plugins/license/LicenseResolverPlugin.groovy

@@ -14,6 +14,7 @@
 
 package com.google.firebase.gradle.plugins.license
 
+import com.android.build.gradle.tasks.BundleAar
 import com.google.firebase.gradle.plugins.license.RemoteLicenseFetcher.AnotherMITLicenseFetcher
 import com.google.firebase.gradle.plugins.license.RemoteLicenseFetcher.AndroidSdkTermsFetcher
 import com.google.firebase.gradle.plugins.license.RemoteLicenseFetcher.AnotherApache2LicenseFetcher
@@ -90,7 +91,7 @@ class LicenseResolverPlugin implements Plugin<Project> {
                     outputDir = licensesDir
                 }
 
-                project.tasks.getByName("bundleReleaseAar") {
+                project.tasks.withType(BundleAar) {
                     dependsOn licensesTask
                     from licensesTask.outputDir
                 }
@@ -102,4 +103,4 @@ class LicenseResolverPlugin implements Plugin<Project> {
     static isAndroidProject(project) {
         ANDROID_PLUGINS.find { plugin -> project.plugins.hasPlugin(plugin) }
     }
-}
+}