UidStatsMapKey.java - uid U32 -> S32 am: 2f0ffdb589

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2218531

Change-Id: I16035b8fea5a6d9786566184e4b48ed10f270f94
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>