VtsKernelProcFileApiTest: Fix testProcUidProcstatSet IndexError am: 1f697687bd

Original change: https://android-review.googlesource.com/c/platform/test/vts/+/3014758

Change-Id: I9854e5484c4bff3943fc8e5911cf2870a8382024
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>