Cannot Resolve Symbol: FusedLocationProviderClient. Google play services version used 11.0.1

You just need to include this in your build.gradle file:

implementation "com.google.android.gms:play-services-location:15.0.1"

or if you're not using latest gradle version:

compile "com.google.android.gms:play-services-location:15.0.1"

Note: It's recommended to use Google Play services version 15.0.1 or higher, which includes bug fixes for this class. More details here.

https://developers.google.com/android/reference/com/google/android/gms/location/FusedLocationProviderClient

In your build.gradle (Module: app), you need to add the following dependency:

dependencies {
    //...
    compile 'com.google.android.gms:play-services:11.0.0'
}

and rebuild your app so it can download the needed dependencies. The class FusedLocationProviderClient is included in this package.