Add voice-to-content tracker values to the enum

Author: zwarm

libs/analytics/src/main/java/org/wordpress/android/analytics/AnalyticsTracker.java

@@ -1140,7 +1140,13 @@ public enum Stat {
         IN_APP_UPDATE_SHOWN,
         IN_APP_UPDATE_DISMISSED,
         IN_APP_UPDATE_ACCEPTED,
-        IN_APP_UPDATE_COMPLETED_WITH_APP_RESTART_BY_USER;
+        IN_APP_UPDATE_COMPLETED_WITH_APP_RESTART_BY_USER,
+        VOICE_TO_CONTENT_SHEET_SHOWN,
+        VOICE_TO_CONTENT_BUTTON_START_RECORDING_TAPPED,
+        VOICE_TO_CONTENT_BUTTON_DONE_TAPPED,
+        VOICE_TO_CONTENT_BUTTON_UPGRADE_TAPPED,
+        VOICE_TO_CONTENT_BUTTON_CLOSE_TAPPED,
+        VOICE_TO_CONTENT_BUTTON_RECORDING_LIMIT_REACHED;
 
         /*
          * Please set the event name in the enum only if the new Stat's name in lower case does not match it.