Use the system namespace to get the right permitted paths for loading OAT files.

The ART namespace doesn't permit e.g. /product/apps, and there may be
other locations too that need to be configurable from the system linker
config.

Test: Boot
Bug: 188078687
Bug: 130340935
Change-Id: Id23c45dec6aef8379b125d70f2a47289f34c5a3a
3 files changed