Add support for loading trusted dex files.

Which can use hidden APIs.

bug: 64382372
Test: m
Merged-In: If859beb46cbb8a815a7e2754f14095759a898a58
Change-Id: If859beb46cbb8a815a7e2754f14095759a898a58
(cherry picked from commit 9ea7438c957358721aa6606ca768f80a08237fe7)
3 files changed