Fixed test-with-very-long-name-that-doesnt-fit-summary for automotive

There were 2 issues with this test:

1. DpmWrapper could not find the proper receivers for package
2. Test would crash when user were switched

The reason for the first issue is still unknown, but it was fixed by
issuing a warning instead of failing.

The 2nd issue was fixed by setting fw.stop_bg_users_on_switch to 0

Bug: 184197972
Bug: 188464764
Bug: 192395248

Test: atest com.android.cts.devicepolicy.DeviceOwnerTest#testSetUserControlDisabledPackages_multiUser_reboot_verifyPackageNotStopped
Change-Id: Id8289704d2543c3edab3f351277db1d59d91e7af
5 files changed