Allow recovery and fastbootd to interact with libfiemap.

In normal Android, libsnapshot interacts with libfiemap over binder (via
IGsid). There is no binder in recovery, so instead, we directly link to
the library and therefore need appropriate sepolicy changes.

Bug: 139154945
Test: no denials in recovery or fastbootd
Change-Id: I356d7b5b906ac198e6f32c4d0cdd206c97faeb84
3 files changed