Bug report

General Information

• Cilium version (run cilium version)
  Client: 1.7.90 79440e7c7 2020-01-21T11:24:41-08:00 go version go1.13.7 linux/amd64
  Daemon: 1.7.90 79440e7c7 2020-01-21T11:24:41-08:00 go version go1.13.7 linux/amd64

• Kernel version (run uname -a)
  Linux k8s1 4.9.212-0409212-generic #202001300045 SMP Thu Jan 30 00:48:17 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

• Orchestration system version in use (e.g. kubectl version, Mesos, ...)
  Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3", GitCommit:"06ad960bfd03b39c8310aaf92d1e7c12ce618213", GitTreeState:"clean", BuildDate:"2020-02-11T18:14:22Z", GoVersion:"go1.13.6", Compiler:"gc", Platform:"linux/amd64"}
  Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3", GitCommit:"06ad960bfd03b39c8310aaf92d1e7c12ce618213", GitTreeState:"clean", BuildDate:"2020-02-11T18:07:13Z", GoVersion:"go1.13.6", Compiler:"gc", Platform:"linux/amd64"}

How to reproduce the issue

1. Fire up the vagrant dev image, K8S=1 NWORKERS=1 ./contrib/vagrant/start.sh
2. ssh into any node
3. cilium endpoint list
4. cilium metrics list | grep cilium_agent

Expected: cilium_agent_api_process_time_seconds metrics shows up.
Seen: only cilium_agent_bootstrap_seconds are observed.

Possible cause: the following commit seems to have removed code that observes api_process_time_seconds

618f568#diff-f1aeb56bac38fbb3c66b18451198c4d3L63