Allows using Google Play Services Task API in Kotlin Coroutines, plus Play Services availability check made easier.

GooglePlayServices.kt

import com.google.android.gms.common.GoogleApiAvailability
import com.google.android.gms.tasks.Task
import splitties.init.appCtx
import kotlin.coroutines.experimental.suspendCoroutine

val googleApiAvailability = GoogleApiAvailability.getInstance()!!
inline val playServicesAvailability get() = googleApiAvailability.isGooglePlayServicesAvailable(appCtx)

@JvmName("awaitVoid")
suspend fun Task<Void>.await() = suspendCoroutine<Unit> { continuation ->
    addOnSuccessListener { continuation.resume(Unit) }
    addOnFailureListener { continuation.resumeWithException(it) }
}

suspend fun <TResult> Task<TResult>.await() = suspendCoroutine<TResult> { continuation ->
    addOnSuccessListener { continuation.resume(it) }
    addOnFailureListener { continuation.resumeWithException(it) }
}