[Output Switcher] [Metric logging] Add package name in Interaction event

Bug: 246756076
Test: N/A
Change-Id: I0cd225feaefb87f982853622b62d38b4299e14eb
diff --git a/stats/atoms.proto b/stats/atoms.proto
index ec33953..9b7ea96 100644
--- a/stats/atoms.proto
+++ b/stats/atoms.proto
@@ -15805,6 +15805,9 @@
 
     // Type of device that interaction with.
     optional android.app.settings.mediaoutput.MediumType target = 2;
+
+    // The package name of an application whose media session is being switched.
+    optional string media_session_package_name= 3;
 }
 
 /**