Fix zero-click sharing description.

At least explain something, until we have a proper animation.

Change-Id: I3d51a36a7362347052b2706af35a469bb4d7964f
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 78a8069..72db3d0 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -1092,7 +1092,7 @@
     <string name="zeroclick_settings_summary"></string>
     <!-- Used in the zero-click sharing preferences screen -->
     <string name="zeroclick_label">Zero-click sharing</string>
-    <string name="zeroclick_explained">Lorem ipsum dolor sit amet.</string>
+    <string name="zeroclick_explained">Zero-click sharing allows you to share content from applications, just by tapping your NFC-enabled device to another.</string>
 
     <!-- Wi-Fi Settings --> <skip />
     <!-- Used in the 1st-level settings screen to turn on Wi-Fi -->