Search in system_ext for SPHALs am: e2b27cd83c

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

Change-Id: I376abcbe3552d017f45fb0ed40cb55e10f8fb513
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>