Merge "Migrate insertkeys.py to Python3" am: eb424f43f2 am: 95824753b2 am: 568c1e2e54

Original change: https://android-review.googlesource.com/c/platform/system/sepolicy/+/1908682

Change-Id: Icb85040126f25de2a4293fef12e5ee0eb0ba3fe8