Docs: Replace Android N/Nougat with Android 7.0.

Change-Id: I05502481b2c3c216ad2708e8050f317e7a11dd2c
diff --git a/src/devices/tech/display/dnd.jd b/src/devices/tech/display/dnd.jd
index 2e1a80b..5588d31 100644
--- a/src/devices/tech/display/dnd.jd
+++ b/src/devices/tech/display/dnd.jd
@@ -24,7 +24,7 @@
   </div>
 </div>
 
-<p>Android N supports the following do not disturb (DND) configurations.</p>
+<p>Android 7.0 supports the following do not disturb (DND) configurations.</p>
 
 <h2 id="third_party">Third-party automatic rules</h3>
 <p>Third-party applications can use the DND Access API to control DND rules:</p>