Make setAffiliationIds public so that it can be used for COMP.
That way we can allow network logging and other features to
work on devices that have a DO and a managed profile.
Those features are currently restricted to single user devices but we'll
open them up to devices where all users are affiliated.
Also create a getter for that API.
Bug: 32326223
Test: m FrameworksServicesTests &&
adb install \
-r ${ANDROID_PRODUCT_OUT}/data/app/FrameworksServicesTests/FrameworksServicesTests.apk &&
adb shell am instrument -e class com.android.server.devicepolicy.DevicePolicyManagerTest \
-w com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner
Change-Id: Ie443be887a6ca61a7f7a07e137757dceab7eb3d3