Search in system_ext for SPHALs am: e2b27cd83c am: 0b4a5fabf4

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/3460631

Change-Id: Icaefee937993faf98ea3e8cb751f5db072a57b37
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>