commit 4489e1dcf8b90858ab7b4caaebf9e97e04f9217d
author Chenjie Yu <cjyu@google.com> Sun Feb 25 19:06:21 2018 -0800
committer Chenjie Yu <cjyu@google.com> Mon Mar 05 15:47:39 2018 -0800
tree b427107cdb955e47378b95f473b1ea2a9eac3c39
parent d4c203bd5580e569b6a24afee4e7c19afcf0635f

Refactor cpu stats pullers

use same cpu stats readers with BatteryStats so that
1) both throttle to avoid too frequent pulls
2) cached value is served within throttle interval to avoid double
pulling by both statsd and BatteryStats

To run unit tests:
bit FrameworksCoreTests:com.android.internal.os.KernelUidCpuFreqTimeReaderTest
bit FrameworksCoreTests:com.android.internal.os.KernelUidCpuClusterTimeReaderTest
bit FrameworksCoreTests:com.android.internal.os.KernelUidCpuActiveTimeReaderTest

make -j56 statsd_test && adb sync data && adb shell /data/nativetest64/statsd_test/statsd_test

Test: cts test, unit test
Fix: 73745189
Fix: 73780619
Fix: 73360959

Change-Id: I10a9bc91ca67fa812f4cd71c4fbd73c1a5ba580e