Replace kAllLists policy with kJustWarn.

It seems pretty unlikely that we'd ever want to disallow access to the
light greylist in P, since doing do would break do many apps. We don't need
this policy here as an opt-in for apps now, since the StrictMode work will
achieve the same thing.

Instead, make a kJustWarn policy which allows access to all APIs, but
leaves the detection and logging logic in place. This gives us the option
of disabling enforcement, but still gathering logs to find out which apps
use which APIs.

Add some tests for GetActionFromAccessFlags since the logic is getting
more complex.

Bug: 77517571
Test: make test-art-host-gtest-hidden_api_test
Test: boot device
Change-Id: I2e6824d7ef53532d0836a2b6b1930cbbed196d0c
3 files changed