Disable build-time debugfs restrictions on GSI builds

These restrictions enable macros that disable sepolicy access to debugfs
for unauthorized clients on S-launching devices. However, since the
Android S GSI build must also be fully functional on earlier devices
that could have possibly depended on debugfs, disable the build-time
restrictions on GSI builds.

Bug: 184381659
Test: make
Change-Id: I583693df5c30d9bab28f76a6c1e4e9db8e5fd89f
Merged-In: I583693df5c30d9bab28f76a6c1e4e9db8e5fd89f