add explicit 32-bits of padding to UidTrackingInfo struct am: 8f4e41d679 am: 0223fd80e7 am: a8f259dd8c

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

Change-Id: I298708be72156d135e764bcfac5972882b9a2f59
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>