Add new constants for managed account provisioning

This is part of the feature to make managed account
provisioning use the admin-integrated flow.

We introduce EXTRA_PROVISIONING_SUPPORTED_MODES
which can be set to one of
SUPPORTED_MODES_ORGANIZATION_OWNED,
SUPPORTED_MODES_PERSONALLY_OWNED or
SUPPORTED_MODES_ORGANIZATION_AND_PERSONALLY_OWNED.
These allow the admin app to
choose between fully-managed device/
organization-owned work profile, personally-
owned work profile or all three respectively.

PROVISIONING_TRIGGER_MANAGED_ACCOUNT will be used
only for logging purposes and determining whether
to respect EXTRA_PROVISIONING_SKIP_EDUCATION_SCREENS.

PROVISIONING_MODE_MANAGED_PROFILE_ON_PERSONAL_DEVICE
is a new provisioning mode choice which the admin app
can choose, if allowed.

EXTRA_PROVISIONING_ALLOWED_PROVISIONING_MODES is an
ArrayList<Integer> extra which will be sent to the
admin app. It will contain a list of the provisioning
modes from which the admin app can choose. If it chooses
a mode that is not part of that list, provisioning
will fail.

This CL also updates the javadoc for
EXTRA_PROVISIONING_SKIP_EDUCATION_SCREENS to state
more correctly the cases when the extra is respected.

This CL also deprecates
PROVISIONING_TRIGGER_PERSISTENT_DEVICE_OWNER as it is now
covered by the broader PROVISIONING_TRIGGER_MANAGED_ACCOUNT.

Bug: 167955145
Test: tests to be added in ManagedProvisioning
Test: compiled - only defining new constants
Change-Id: I6cc8581ce5e609155480bc6aeb04af0c800267cd