[metrics] Enable periodic reporting for system server
This enables reporting from system server once an hour.
The reason is that system server is long-running, so startup metrics,
which are all that are enabled by default otherwise, are not as
meaningful. Note that the reporting period can still be overridden by
a command line argument.
Testing instructions:
adb shell setprop dalvik.vm.extra-opts -Xwrite-metrics-to-log
adb logcat -e "ART internal metrics"
Observe periodic system server reports.
Bug: 170149255
Test: manual (see above)
Test: ./test.py --run-test --host -t 911
Change-Id: I71775e454c6fd07c4312e3df9ae8082fa497ea93
4 files changed
