Update EXTRA_PROVISIONING_SUPPORTED_MODES values to flags

This addresses API council feedback.

SUPPORTED_MODES_ORGANIZATION_OWNED is now
FLAG_SUPPORTED_MODES_ORGANIZATION_OWNED.
SUPPORTED_MODES_PERSONALLY_OWNED is
FLAG_SUPPORTED_MODES_PERSONALLY_OWNED.
SUPPORTED_MODES_DEVICE_OWNER is
FLAG_SUPPORTED_MODES_DEVICE_OWNER.

SUPPORTED_MODES_ORGANIZATION_AND_PERSONALLY_OWNED is now
FLAG_SUPPORTED_MODES_ORGANIZATION_OWNED |
FLAG_SUPPORTED_MODES_PERSONALLY_OWNED.

Note that these new flags have the same exact values as
the original values, so no changes are needed to be done
for the provisioning trigger.

Fixes: 179709752
Test: atest ManagedProvisioningTests
Test: atest ManagedProvisioningRoboTests
Change-Id: I1845837e752df5750083dc3bf31cbc356f4d24b7