Merge "Remove unused mOpenSessionCallsPerUid from NetworkStatsService" am: ea23c52b7f

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2206163

Change-Id: I941cc58c9cbc4d2bd722807cca87b182cdd58be3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>