system_api: bluetooth: Update battery-related constants

BUG=b:172361193
TEST=None

Change-Id: I7667bf7b4b052115c327155da72deda27e18b112
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2594370
Reviewed-by: Alain Michaud <alainm@chromium.org>
Commit-Queue: Sonny Sasaka <sonnysasaka@chromium.org>
Tested-by: Sonny Sasaka <sonnysasaka@chromium.org>
diff --git a/system_api/dbus/bluetooth/dbus-constants.h b/system_api/dbus/bluetooth/dbus-constants.h
index ad630a8..4124b60 100644
--- a/system_api/dbus/bluetooth/dbus-constants.h
+++ b/system_api/dbus/bluetooth/dbus-constants.h
@@ -137,7 +137,18 @@
 constexpr char kBluetoothBatteryServiceName[] = "org.bluez";
 constexpr char kBluetoothBatteryInterface[] = "org.bluez.Battery1";
 
+// Bluetooth Battery Provider API identifiers.
+constexpr char kBluetoothBatteryProviderManagerServiceName[] = "org.bluez";
+constexpr char kBluetoothBatteryProviderManagerInterface[] =
+    "org.bluez.BatteryProviderManager1";
+constexpr char kBluetoothBatteryProviderInterface[] =
+    "org.bluez.BatteryProvider1";
+
+// Bluetooth Battery Provider Manager methods.
+constexpr char kRegisterBatteryProvider[] = "RegisterBatteryProvider";
+
 // Bluetooth Battery properties.
+constexpr char kDeviceProperty[] = "Device";
 constexpr char kPercentageProperty[] = "Percentage";
 }  // namespace bluetooth_battery