Move GetUdevDevicePropertyValue from components/storage_monitor to device/udev_linux and rename to …

device/udev_linux/udev.cc

Index: device/udev_linux/udev.cc
diff --git a/device/udev_linux/udev.cc b/device/udev_linux/udev.cc
index ae23bef9a36a90220ab9ba6f06064fc71811416b..a3fc0e941b2b4bab43dcfee1d46c279403faa90e 100644
--- a/device/udev_linux/udev.cc
+++ b/device/udev_linux/udev.cc
@@ -146,4 +146,10 @@ void udev_unref(udev* udev) {
   UdevLoader::Get()->udev_unref(udev);
 }
 
+std::string UdevDeviceGetPropertyValue(udev_device* udev_device,
+                                       const char* key) {
+  const char* value = device::udev_device_get_property_value(udev_device, key);
+  return value ? value : std::string();
+}
+
 }  // namespace device