Metrics: num connections with mac randomization

Bug: 124121205
Test: unit tests
Test: dumpsys wifi
Change-Id: I34a75e6525b3f59c32969b3fc772bce0111b022d
diff --git a/proto/src/wifi.proto b/proto/src/wifi.proto
index 2b45b49..f4ef576 100644
--- a/proto/src/wifi.proto
+++ b/proto/src/wifi.proto
@@ -668,6 +668,9 @@
 
   // Has bug report been taken.
   optional bool automatic_bug_report_taken = 9;
+
+  // Connection is using locally generated random MAC address.
+  optional bool use_randomized_mac = 10 [default = false];
 }
 
 // Number of occurrences of a specific RSSI poll rssi value