Merge "Reset PAC keys on thread creation instead of on zygote fork." am:...

Merge "Reset PAC keys on thread creation instead of on zygote fork." am: 0c612627 am: 90a348d8 am: d7d903b3 am: 1f0cc466

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1653717

Change-Id: I60bd3ba43e4abb8fce3c48e07b11bdcd8043e329