This leaves only the existence of ephemeral_app domain as public API.
All other rules are implementation details of this domain's policy and
are thus now private. There are a few rules, defined by other domains'
files remaining in the public policy until the rules from these
domains also move to the private policy:

allow ephemeral_app_current appdomain:binder transfer;
allow ephemeral_app_current audioserver_current:binder transfer;
allow ephemeral_app_current drmserver_current:binder transfer;
allow ephemeral_app_current dumpstate_current:binder transfer;
allow ephemeral_app_current mediaserver_current:binder transfer;
allow ephemeral_app_current surfaceflinger_current:binder transfer;
allow ephemeral_app_current system_server_current:binder transfer;

Test: No change to policy according to sesearch, except for
      disappearance of all allow rules from platform_app_current
      attribute (as expected).
Bug: 31364497

Change-Id: I98687181434a98a141469ef676c461fcd1db2d4e

Address denial type=1400 audit(0.0:42): avc: denied { call } for
scontext=u:r:untrusted_app:s0:c512,c768
tcontext=u:r:ephemeral_app:s0:c207,c258,c512,c768 tclass=binder

Test: Above denial no longer happens
Change-Id: I351269ee4671cfd51c981d3db5d0f3944d14e702

In order to support platform changes without simultaneous updates from
non-platform components, the platform and non-platform policies must be
split.  In order to provide a guarantee that policy written for
non-platform objects continues to provide the same access, all types
exposed to non-platform policy are versioned by converting them and the
policy using them into attributes.

This change performs that split, the subsequent versioning and also
generates a mapping file to glue the different policy components
together.

Test: Device boots and runs.
Bug: 31369363
Change-Id: Ibfd3eb077bd9b8e2ff3b2e6a0ca87e44d78b1317

Lock in the gains we've made so far in restricting access to generically
labeled /proc files. There's more we can do here, but let's avoid
inadvertent regressions.

Test: policy compiles. Only compile time assertions added.
Bug: 26813932
Change-Id: If354c2ddc1c59beed7f0eb4bcbd3f0d9971c3b8a

Test: Verify that HTTP and HTTPS connections from ephemeral apps do not
cause denials.
Change-Id: I0ce25602906e63ec55d5b5869445f2aec10900cb

Fixes: 32061937
Test: install/uninstall and verified no denials
Change-Id: I487727b6b32b1a0fb06ce66ed6dd69db43c8d536

Test: Builds and boots
Change-Id: I3db64e12f0390c6940f5745eae83ce7efa7d65a9