Error_counts metric with experiment metadata

Mendel configuration:
https://source.corp.google.com/piper///depot/google3/googledata/experiments/tq_cobalt/prober/

Bug: 90738
Change-Id: I1ae415dacdfc704d9c664123883c7af9d05c3490
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/614902
Fuchsia-Auto-Submit: Jared Weinstein <jaredweinstein@google.com>
Reviewed-by: Cameron Dale <camrdale@google.com>
Privacy-Approval: Cameron Dale <camrdale@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
diff --git a/fuchsia/prober/metrics.yaml b/fuchsia/prober/metrics.yaml
index 61906d9..418cbcc 100644
--- a/fuchsia/prober/metrics.yaml
+++ b/fuchsia/prober/metrics.yaml
@@ -80,6 +80,12 @@
       min_value: 0
       max_value: 3600
       system_profile_field: [OS, ARCH, BOARD_NAME, PRODUCT_NAME, SYSTEM_VERSION, CHANNEL, REALM]
+    - report_name: error_counts_experiment
+      id: 3
+      report_type: FLEETWIDE_OCCURRENCE_COUNTS
+      privacy_level: NO_ADDED_PRIVACY
+      system_profile_field: [OS, ARCH, BOARD_NAME, PRODUCT_NAME, SYSTEM_VERSION, CHANNEL, REALM, EXPERIMENT_IDS]
+      experiment_id: [48954961, 48954962]
   meta_data:
     max_release_stage: DEBUG
     expiration_date: "2022/04/08"
diff --git a/fuchsia/test_app2/metrics.yaml b/fuchsia/test_app2/metrics.yaml
index ff14684..8585c17 100644
--- a/fuchsia/test_app2/metrics.yaml
+++ b/fuchsia/test_app2/metrics.yaml
@@ -80,6 +80,12 @@
       min_value: 0
       max_value: 3600
       system_profile_field: [OS, ARCH, BOARD_NAME, PRODUCT_NAME, SYSTEM_VERSION, CHANNEL, REALM]
+    - report_name: error_counts_experiment
+      id: 3
+      report_type: FLEETWIDE_OCCURRENCE_COUNTS
+      privacy_level: NO_ADDED_PRIVACY
+      system_profile_field: [OS, ARCH, BOARD_NAME, PRODUCT_NAME, SYSTEM_VERSION, CHANNEL, REALM, EXPERIMENT_IDS]
+      experiment_id: [48954961, 48954962]
   meta_data:
     max_release_stage: DEBUG
     expiration_date: "2022/04/08"