convert-to-ext4-sh.te: use su domain instead am: 588e82af38

Original change: https://android-review.googlesource.com/c/device/google/gs201-sepolicy/+/3308857

Change-Id: Id2d0ae24894dee7321bbfe5f3ee232acf083a652
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>