add explicit 32-bits of padding to UidTrackingInfo struct am: 8f4e41d679 am: c34fb53875

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

Change-Id: I5c321cea1222a9ffbf409f8c4c0ec73252a93e8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>