add ion memory metric

Bug: b/135925438
Change-Id: Idb35cad24450363f961c8a3e3de4b56a0ff3ef04
diff --git a/protos/BUILD b/protos/BUILD
index 3368d94..3705c24 100644
--- a/protos/BUILD
+++ b/protos/BUILD
@@ -234,6 +234,7 @@
         "perfetto/metrics/android/batt_metric.proto",
         "perfetto/metrics/android/cpu_metric.proto",
         "perfetto/metrics/android/heap_profile.proto",
+        "perfetto/metrics/android/ion_metric.proto",
         "perfetto/metrics/android/lmk_metric.proto",
         "perfetto/metrics/android/mem_metric.proto",
         "perfetto/metrics/android/powrails_metric.proto",
@@ -276,6 +277,7 @@
         "perfetto/metrics/android/batt_metric.proto",
         "perfetto/metrics/android/cpu_metric.proto",
         "perfetto/metrics/android/heap_profile.proto",
+        "perfetto/metrics/android/ion_metric.proto",
         "perfetto/metrics/android/lmk_metric.proto",
         "perfetto/metrics/android/mem_metric.proto",
         "perfetto/metrics/android/powrails_metric.proto",