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Re:Notices have already been issued under Australia’s new en... by GordonS on Wednesday February 06, 2019 @01:38PM (#19098176)
I don't know, but I presume Google cross-signs APKs that are approved through the Play Store?
Re:Notices have already been issued under Australia’s new en... by Arnt on Wednesday February 06, 2019 @01:53PM (#19098356)
No.

Easily checked, run jarsigner -verify -verbose -certs some.apk on an APK of your choice. I ran it on 31 just now, no cross-signing visible anywhere.