Refactor MeasurementCtsDebuggableTest to reduce latency

Reduced sleep time and separated one test into four. Also corrected
delete registration call.

Bug: 289710698

Test: atest CtsAdServicesDebuggableDeviceTestCases:MeasurementCtsDebuggableTest

Change-Id: I1d79fead7505108d83230898eb9b1fb7ad8599eb
1 file changed