Doze settings example not matching real keys

The keys used in the example for the Doze timeouts does
not match any real key. To avoid confusion the example
should match the existing keys.

Change-Id: I0306c542dac9e38aea7d172a3e0f7472d327c73c

core/java/android/provider/Settings.java

@@ -7249,7 +7249,7 @@ public final class Settings {
          * Device Idle (Doze) specific settings.
          * This is encoded as a key=value list, separated by commas. Ex:
          *
-         * "inactive_timeout=60000,sensing_timeout=400000"
+         * "inactive_to=60000,sensing_to=400000"
          *
          * The following keys are supported:
          *