Revert "Move coredomain seapp contexts to system_ext"

This reverts commit 821f3f5be787a278a629ce51b790b8af84f407b9.

Reason for revert: breaking boot tests b/292204627

Bug:292204627
Change-Id: I8f2650a14b17650220d050d58fee4dda4834c30e
4 files changed