An incident.proto section has been added to the bugreport. Need
appropriate sepolicy changes to allow binder calls and fd access.

Bug: 119417232
Test: adb bugreport. Verify incident.proto is in the proto folder,
      and there are no sepolicy violations.

Change-Id: Iac27cbf283a2e1cb41862c76343c2b639f6c0e1e

system_file_type is a new attribute used to identify files which exist
on the /system partition. It's useful for allow rules in init, which are
based off of a blacklist of writable files. Additionally, it's useful
for constructing neverallow rules to prevent regressions.

Additionally, add commented out tests which enforce that all files on
the /system partition have the system_file_type attribute. These tests
will be uncommented in a future change after all the device-specific
policies are cleaned up.

Test: Device boots and no obvious problems.
Change-Id: Id9bae6625f042594c8eba74ca712abb09702c1e5

Bug: 73354384
Test: manual
Change-Id: Iaaeded69c287eae757aaf68dc18bc5a0c53b94e6

Bug: 73354384
Test: manual
Change-Id: I4fa630624cc247275e11965471461502f451edf4

Bug: 64222712
Test: manual
Change-Id: Ica77ae3c9e535eddac9fccf11710b0bcb3254ab3