Hold wifi and mobile interfaces since boot in NetworkStatsService am: a2f1cf3576

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/18710006

Change-Id: Ibfab926c72be24c1bdfabf74beca70383bc8fd1b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>