Merge "Update LegacyStatsCollector to conform with Wc++11-narrowing" into main am: e4cabeb981 am: e1adbd1c31

Original change: https://android-review.googlesource.com/c/platform/external/webrtc/+/3014835

Change-Id: I4e27d51421b04ed7f51171718f4ea314edbc8110
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>