Merge "Detect system_ext provenance for APKs-in-APEX" am: 66fadd9057 am: 618d74c54a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1884589

Change-Id: I9c47f53d14c95069f4f2456e52d60f4d5e3bb017