Remove unnecessary HAL permissions

Comments indicate that these permissions are used to access already
open FDs. However, getattr of a directory is clearly not necessary
for that, search of system_data_file is already granted to domain
and following symlinks is clearly not needed for reading an already
open FD.

Bug: 34980020
Test: boot marlin. Test drm with google play movies, no related
    denials
Test: cts-tradefed run cts -m CtsMediaTestCases -t \
    android.media.cts.MediaCasTest
    5/6 tests fail with no related selinux denials. The same 5/6
    also fail in selinux permissive mode.
Change-Id: Ib4b9a1e18bdc479d656b2d64917bbc0358515525