AdvertisingIdClient#getAdvertisingIdInfo sometimes returns null since v9.8.0 : <p>I got an issue since I bumped the play-services version to v9.8.0. I notice that the method AdvertisingIdClient#getAdvertisingIdInfo sometimes returns null (i have not identified any pattern to reproduce this case yet).</p>

<p>Do you if this a new behavior of this API (The documentation is not clear whether this method may return null or not) or if this a bug i should report to play services developers ?</p>

<p>This is a breaking change for me because I use some sdk which use this method without checking the returned value nullity.</p>

<p>Thanks !</p>
