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 e46e7a9b89ed12953058d31d1649cb3b4e2cd33f..bfd457efd8508c32d841caed0ece53aa24a8e185 100644
--- a/device/bluetooth/public/interfaces/adapter.mojom
+++ b/device/bluetooth/public/interfaces/adapter.mojom
@@ -12,6 +12,20 @@ struct DeviceInfo {
 };
 
 interface Adapter {
+  // Gets the address of the adapter.
+  // Returns empty string if address cannot be retrieved.
+  GetAddress() => (string address);
+
+  // Gets the name of the adapter.
+  // Returns empty string if name cannot be retrieved.
+  GetName() => (string name);
+
+  // Returns true if adapter is powered.
+  IsPowered() => (bool powered);
+
+  // Returns true if adapter is present.
+  IsPresent() => (bool present);
+
   // 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.