Add a new read-only flag to invalidate PICs at start.

This is needed to fix a bug where PICs are not invalidated at a start, which causes them to not work properly.

Bug: 356167673
Change-Id: Ie275a1d959296d56fccd40d175d0eb8b8110fc60
Flag: android.multiuser.caches_not_invalidated_at_start_read_only
Test: N/A