Google has recently started rolling out factory images for Nexus 4, Nexus 7 (2013) and Nexus 7 LTE. Now that it looks like Android 5.1.1 is ready for Nexus 7 and Nexus 9 smartphones, will hit the shelves very soon. Details on what Android 5.1.1 Lollipop update brings with it.
Google in a Reddit post has confirmed that both the 2013 Nexus 7 and Nexus 9 will get the latest version 5.1.2 Android Lollipop update. With the build number the new update is also highlighted in bold in the post.
For Nexu 7 (2013) is LMY47W build number, and LMY47S for Nexus 9. The latter one already suns on Android 5.0.1 and will indeed gets 5.1.1 directly over the air. Currently, no more information has surfaced about when Google will be rolling out the update for these devices.