Allow vendor_init to access unencrypted_data_file

FBE needs to access these files to set up or verify encryption for
directories during mkdir.

Bug: 77850279
Test: walleye + more restrictions continues to have FBE work
Change-Id: I84e201436ce4531d36d1257d932c3e2e772ea05e
(cherry picked from commit 18a284405f519ae49898031a4bea70e5e2d2fdac)
2 files changed