Add temporary DeviceTypeName of Laptop for all cros devices.

telemetry/telemetry/internal/platform/cros_platform_backend.py

Index: telemetry/telemetry/internal/platform/cros_platform_backend.py
diff --git a/telemetry/telemetry/internal/platform/cros_platform_backend.py b/telemetry/telemetry/internal/platform/cros_platform_backend.py
index 2d839df93dd71a785fb4d6de470c1346384f53fd..509ca528076527a4f46a2d4ced64d3e24152e01d 100644
--- a/telemetry/telemetry/internal/platform/cros_platform_backend.py
+++ b/telemetry/telemetry/internal/platform/cros_platform_backend.py
@@ -120,6 +120,9 @@ class CrosPlatformBackend(
       sample_stats[cpu] = cstates
     return sample_stats
 
+  def GetDeviceTypeName(self):
+    return 'Laptop'
+
   @decorators.Cache
   def GetArchName(self):
     return self._cri.GetArchName()