Show battery level fo devices on buildbot.

Change-Id: Ic8279d1905c8a6efe08ca190f1bb7332842e1904
diff --git a/tools/setup-buildbot-device.sh b/tools/setup-buildbot-device.sh
index d5b8989..45b60dc 100755
--- a/tools/setup-buildbot-device.sh
+++ b/tools/setup-buildbot-device.sh
@@ -34,6 +34,9 @@
 echo -e "${green}Uptime${nc}"
 adb shell uptime
 
+echo -e "${green}Battery info${nc}"
+adb shell dumpsys battery
+
 echo -e "${green}Kill stalled dalvikvm processes${nc}"
 processes=$(adb shell "ps" | grep dalvikvm | awk '{print $2}')
 for i in $processes; do adb shell kill -9 $i; done