add explicit 32-bits of padding to UidTrackingInfo struct am: 8f4e41d6 am: 3d883364

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/18800447



Change-Id: Ib534b35057c0abb6510f2b98e4abea788f6675fa
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>