Yabin Cui cb6f599c44 Fix the way to count online cpus.
Read /proc/stat to count online cpus is not correct for all android
kernels. Change to reading /sys/devices/system/cpu/online instead.

Bug: 24376925
Change-Id: I3785a6c7aa15a467022a9a261b457194d688fb38
2015-09-29 17:49:37 -07:00
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