Minor changes to check for misprovisioned Pixel 2 devices

Check for brand parameter specified in config file. Implementing suggestion that was added to the original CL (ag/4791307) after it was submitted.

Bug: 69471841
Test: atest com.android.cts.devicepolicy.MixedDeviceOwnerTest#testKeyManagement
Change-Id: I9b257f406d5b47265db4dbf022df75865f496cdd
1 file changed