Document Subtype additions for ACTION_WIFI_CONNECT, ACTION_WIFI_OFF.

Bug: 32371451
Test: n/a
Change-Id: Ib4f0eb49242c9ec248f3e8931ff73d35c2cb1167
diff --git a/proto/src/metrics_constants.proto b/proto/src/metrics_constants.proto
index ba0725e..48bc27e 100644
--- a/proto/src/metrics_constants.proto
+++ b/proto/src/metrics_constants.proto
@@ -689,6 +689,7 @@
     ACTION_WIFI_ADD_NETWORK = 134;
 
     // ACTION: Settings > Wi-Fi > [Long press network] > Connect to network
+    //   SUBTYPE: true if connecting to a saved network, false if not
     // CATEGORY: SETTINGS
     // OS: 6.0
     ACTION_WIFI_CONNECT = 135;
@@ -704,6 +705,7 @@
     ACTION_WIFI_FORGET = 137;
 
     // ACTION: Settings > Wi-Fi > Toggle off
+    //   SUBTYPE: true if connected to network before toggle, false if not
     // CATEGORY: SETTINGS
     // OS: 6.0
     ACTION_WIFI_OFF = 138;