examples/speaker: fix volume trait

Bug: 27276010
Change-Id: Ib5c6fbf51d4d6ae8d2e09920c3bd4134e1f87ae5
Reviewed-on: https://weave-review.googlesource.com/2749
Reviewed-by: Paul Westbrook <pwestbro@google.com>

examples/daemon/speaker/speaker.cc

diff --git a/examples/daemon/speaker/speaker.cc b/examples/daemon/speaker/speaker.cc
index 35eee2f..56da840 100644
--- a/examples/daemon/speaker/speaker.cc
+++ b/examples/daemon/speaker/speaker.cc
@@ -19,7 +19,7 @@
         "parameters": {
           "state": {
             "type": "string",
-            "enum": [ "on", "standby" ]
+            "enum": [ "on", "off" ]
           }
         }
       }
@@ -27,7 +27,7 @@
     "state": {
       "state": {
         "type": "string",
-        "enum": [ "on", "standby" ],
+        "enum": [ "on", "off" ],
         "isRequired": true
       }
     }
@@ -149,7 +149,7 @@
 
   void UpdateSpeakerState() {
     base::DictionaryValue state;
-    state.SetString("onOff.state", speaker_status_ ? "on" : "standby");
+    state.SetString("onOff.state", speaker_status_ ? "on" : "off");
     state.SetBoolean("volume.isMuted", isMuted_status_);
     state.SetInteger("volume.volume", volume_value_);
     device_->SetStateProperties(kComponent, state, nullptr);