Support dynamic upgrade when the device is connected to Wifi AP after initial connection.

PiperOrigin-RevId: 556959762

connections/implementation/proto/offline_wire_formats.proto

@@ -47,6 +47,7 @@ message V1Frame {
     AUTHENTICATION_RESULT = 9;
     AUTO_RESUME = 10;
     AUTO_RECONNECT = 11;
+    BANDWIDTH_UPGRADE_RETRY = 12;
   }
   optional FrameType type = 1;
 
@@ -62,6 +63,7 @@ message V1Frame {
   optional AuthenticationResultFrame authentication_result = 10;
   optional AutoResumeFrame auto_resume = 11;
   optional AutoReconnectFrame auto_reconnect = 12;
+  optional BandwidthUpgradeRetryFrame bandwidth_upgrade_retry = 13;
 }
 
 message ConnectionRequestFrame {
@@ -307,6 +309,34 @@ message BandwidthUpgradeNegotiationFrame {
   optional ClientIntroductionAck client_introduction_ack = 4;
 }
 
+message BandwidthUpgradeRetryFrame {
+  // Should always match cs/symbol:location.nearby.proto.connections.Medium
+  // LINT.IfChange
+  enum Medium {
+    UNKNOWN_MEDIUM = 0;
+    // 1 is reserved.
+    BLUETOOTH = 2;
+    WIFI_HOTSPOT = 3;
+    BLE = 4;
+    WIFI_LAN = 5;
+    WIFI_AWARE = 6;
+    NFC = 7;
+    WIFI_DIRECT = 8;
+    WEB_RTC = 9;
+    BLE_L2CAP = 10;
+    USB = 11;
+  }
+  // LINT.ThenChange(//depot/google3/third_party/nearby/proto/connections_enums.proto)
+
+  // The mediums this device supports upgrading to. This list should be filtered
+  // by both the strategy and this device's individual limitations.
+  repeated Medium supported_medium = 1;
+
+  // If true, expect the remote endpoint to send back the latest
+  // supported_medium.
+  optional bool is_request = 2;
+}
+
 message KeepAliveFrame {
   // And ack will be sent after receiving KEEP_ALIVE frame.
   optional bool ack = 1;