Merge "use startUser() with wait in CtsDevicePolicyManagerTestCases" am: 8a9589bd9f am: 38304b72ee am: fd2c37900d

Original change: https://android-review.googlesource.com/c/platform/cts/+/1465868

Change-Id: I2afbfdf31ddfcf39b21ea406ac9c33e988574936