add UMA metrics for voice interaction entries.

tools/metrics/actions/actions.xml

Index: tools/metrics/actions/actions.xml
diff --git a/tools/metrics/actions/actions.xml b/tools/metrics/actions/actions.xml
index bd2d78f7d107f917bf250d6a50499e977f4e4121..263099fa9e10974d0ff34ff18752f9e171ff3d84 100644
--- a/tools/metrics/actions/actions.xml
+++ b/tools/metrics/actions/actions.xml
@@ -16843,6 +16843,33 @@ should be able to be added at any place in this file.
   <description>Please enter the description of this user action.</description>
 </action>
 
+<action name="VoiceInteraction.MetalayerStarted.Search_Shift_A">
+  <owner>muyuanli@chromium.org</owner>
+  <description>User launched metalayer through Search + Shift + A.</description>
+</action>
+
+<action name="VoiceInteraction.Started.AppListButtonLongPress">
+  <owner>muyuanli@chromium.org</owner>
+  <description>
+    User launched voice interaction session through long pressing app list
+    button.
+  </description>
+</action>
+
+<action name="VoiceInteraction.Started.Search_A">
+  <owner>muyuanli@chromium.org</owner>
+  <description>
+    User launched voice interaction session through Search + A.
+  </description>
+</action>
+
+<action name="VoiceInteraction.Started.Search_Space">
+  <owner>muyuanli@chromium.org</owner>
+  <description>
+    User launched voice interaction session through Search + Space.
+  </description>
+</action>
+
 <action name="WP_EditImage">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>