接入google firebase导致打包失败，报错：

:app:uploadCrashlyticsMappingFileRelease

 解决办法：

    // 屏蔽 task (uploadCrashlyticsMappingFileRelease)
    gradle.taskGraph.whenReady {
        tasks.each { task ->
            if (task.name.contains("uploadCrashlyticsMappingFileRelease")) {
                task.enabled = false
            }
        }
    }