Merge "allocateSpaceForUpdate: clear calling identity before calling into apexd." into sc-dev am: 4db95cce am: fb7a52b9 am: ac84bb81

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15028970

Change-Id: Idce5f1ccf4705f00b94708aa269c03cf250d1866