Android: makes bb_device_status_check more robust.

Some bots timeout on "dumpsys batteryinfo".
This unecessarily prevent the bot from running and also stops printing
the "Device Offline" bug link.
Make it more robust.

BUG=326526
TBR=navabi@chromium.org

Review URL: https://codereview.chromium.org/109913003

git-svn-id: http://src.chromium.org/svn/trunk/src/build@240090 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/buildbot/bb_device_status_check.py

@@ -50,7 +50,11 @@ def DeviceInfo(serial, options):
   device_build_type = device_adb.GetBuildType()
   device_product_name = device_adb.GetProductName()
 
-  battery = device_adb.GetBatteryInfo()
+  try:
+    battery = device_adb.GetBatteryInfo()
+  except Exception as e:
+    battery = None
+    logging.error('Unable to obtain battery info for %s, %s', serial, e)
 
   def _GetData(re_expression, line, lambda_function=lambda x:x):
     if not line: