cpu/usage_time is not reported

[yfuruyama]

Describe the bug
Metric agent.googleapis.com/cpu/usage_time is not reported. This is a documented metric.

To Reproduce
Steps to reproduce the behavior:

1. Just install and start the Ops Agent.

Expected behavior
Metric agent.googleapis.com/cpu/usage_time is reported.

Environment (please complete the following information):

• Ops Agent version: 2.16.0
• Ops Agent configuration: default configuration

Additional context
It looks like system.cpu.time (cpu/usage_time) is excluded without any reason described:

ops-agent/apps/hostmetrics.go

Lines 67 to 68 in 7d8d128

	// Temporarily exclude system.cpu.time (cpu/usage_time)
	"system.cpu.time",

[boetro]

Just ran into this also. Is there any work around to get it working?

[nioncode]

Similar to #1793, did you find a way to solve this?