In https://android-review.googlesource.com/66562 , there
was a discussion about the role the unconfined template
plays. Document the unconfined template so that those
expectations are better understood.

Change-Id: I20ac01ac2d4496b8425b6f63d4106e8021bc9b2f

Bug: 9859477
Change-Id: Iadd26cac2f318b81701310788bed795dadfa5b6b

For unlabeled files, revert to DAC rules. This is for backwards
compatibility, as files created before SELinux was in place may
not be properly labeled.

Over time, the number of unlabeled files will decrease, and we can
(hopefully) remove this rule in the future.

To prevent inadvertantly introducing the "relabelto" permission, add
a neverallow domain, and add apps which have a legitimate need to
relabel to this domain.

Bug: 9777552
Change-Id: I71b0ff8abd4925432062007c45b5be85f6f70a88

Bug: 8424461
Change-Id: I8f0b01cdb19b4a479d5de842f4e4844aeab00622

This prevents denials from being generated by the base policy.
Over time, these rules will be incrementally tightened to improve
security.

Change-Id: I4be1c987a5d69ac784a56d42fc2c9063c402de11

Change-Id: Ieeaa002061c9e4224ea90dfa60dffb112aa152c2
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

The binder_transfer_binder hook was changed in the kernel, obsoleting
the receive permission and changing the target of the transfer permission.
Update the binder-related policy to match the revised permission checking.

Change-Id: I1ed0dadfde2efa93296e967eb44ca1314cf28586
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

New property_contexts file for property selabel backend.
New property.te file with property type declarations.
New property_service security class and set permission.
Allow rules for setting properties.