Migrate KeyManagementTest remaining tests

This CL doesn't include the tests that:
* Call DPM.generateKeyPair (b/198408853)
* Call KeyChain.getPrivateKey with TestApp context (b/198407955)

* Use new CTS testing infra
* go/migrating-enterprise-tests
* go/bedstead

Bug: 197859595
Test: atest android.devicepolicy.cts.KeyManagementTest
Change-Id: I6f5ee17391b05b261cd288522431038c86b7b3c1
Merged-In: I6f5ee17391b05b261cd288522431038c86b7b3c1
(cherry picked from commit 39e706334363df13acaac22185b92a45950d59d7)
2 files changed