bluetooth: Add AdapterInfo in Bluetooth adapter service.

device/bluetooth/public/interfaces/adapter.mojom

Index: device/bluetooth/public/interfaces/adapter.mojom
diff --git a/device/bluetooth/public/interfaces/adapter.mojom b/device/bluetooth/public/interfaces/adapter.mojom
index a5ef798874602f737f0af81f2a0a29b6a3bec353..0ac42f5f14b876aaab61951025d826263ee1058f 100644
--- a/device/bluetooth/public/interfaces/adapter.mojom
+++ b/device/bluetooth/public/interfaces/adapter.mojom
@@ -4,6 +4,16 @@
 
 module bluetooth.mojom;
 
+struct AdapterInfo {
+  string address;
+  string name;
+  bool initialized;
+  bool present;
+  bool powered;
+  bool discoverable;
+  bool discovering;
+};
+
 struct DeviceInfo {
   string? name;
   string name_for_display;
@@ -12,6 +22,9 @@ struct DeviceInfo {
 };
 
 interface Adapter {
+  // Gets basic information about the adapter.
+  GetInfo() => (AdapterInfo info);
+
   // Retrieves the list of the devices known by the adapter including Connected
   // Devices, GATT Connected Devices, Paired Devices and Devices discovered
   // during a classic or low-energy scan.