Make android::base::Basename() safe. am: 657800047a

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/libbase/+/18599454

Change-Id: I56ef2f43556a0fdbe4c4d7a20e0bd0c10f592632
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>