[PASSPOINT] Add metrics to determine deployment/avail of Passpoint

Add metrics which will help determine Passpoint availability in the
wild. The metrics measure the percentage of time a Passpoint network
is visible to user - by collecting historgrams of observations per
scan result.

(cherry-pick of commit c462a7a4c15ca7c35002c84de4ff115be12b28a1)

Bug: 66951771
Test: unit test
Merged-In: I8c91f490a533f90a4f0630e1cb461e1d2643358b
Change-Id: I08367ab2c45900c76b65cea980a9b4a335b3dcdb
(cherry picked from commit 8c88b5e2e17fdee5eb192c4bb388472878b79811)

1 files changed, 28 insertions, 0 deletions

diff --git a/proto/src/wifi.proto b/proto/src/wifi.proto
index 54eba2b332a4..ee0c04331da2 100644
--- a/proto/src/wifi.proto
+++ b/proto/src/wifi.proto
@@ -336,6 +336,34 @@ message WifiLog {
 
   // Count of connection attempts that were initiated unsuccessfully
   optional int32 num_open_network_connect_message_failed_to_send = 82;
+
+  // Histogram counting instances of scans with N many HotSpot 2.0 R1 APs
+  repeated NumConnectableNetworksBucket observed_hotspot_r1_aps_in_scan_histogram = 83;
+
+  // Histogram counting instances of scans with N many HotSpot 2.0 R2 APs
+  repeated NumConnectableNetworksBucket observed_hotspot_r2_aps_in_scan_histogram = 84;
+
+  // Histogram counting instances of scans with N many unique HotSpot 2.0 R1 ESS.
+  // Where ESS is defined as the (HESSID, ANQP Domain ID), (SSID, ANQP Domain ID) or
+  // (SSID, BSSID) tuple depending on AP configuration (in the above priority
+  // order).
+  repeated NumConnectableNetworksBucket observed_hotspot_r1_ess_in_scan_histogram = 85;
+
+  // Histogram counting instances of scans with N many unique HotSpot 2.0 R2 ESS.
+  // Where ESS is defined as the (HESSID, ANQP Domain ID), (SSID, ANQP Domain ID) or
+  // (SSID, BSSID) tuple depending on AP configuration (in the above priority
+  // order).
+  repeated NumConnectableNetworksBucket observed_hotspot_r2_ess_in_scan_histogram = 86;
+
+  // Histogram counting number of HotSpot 2.0 R1 APs per observed ESS in a scan
+  // (one value added per unique ESS - potentially multiple counts per single
+  // scan!)
+  repeated NumConnectableNetworksBucket observed_hotspot_r1_aps_per_ess_in_scan_histogram = 87;
+
+  // Histogram counting number of HotSpot 2.0 R2 APs per observed ESS in a scan
+  // (one value added per unique ESS - potentially multiple counts per single
+  // scan!)
+  repeated NumConnectableNetworksBucket observed_hotspot_r2_aps_per_ess_in_scan_histogram = 88;
 }
 
 // Information that gets logged for every WiFi connection.