Fix CTS tests on multi sensor devices (mostly) All tests are improved but can still fail due to flakiness in cleanup (main cause seems to be stale enrollments). Bug: 186600837 Bug: 186371020 Bug: 187250205 Test: atest CtsBiometricsTestCases Change-Id: Iae516b912999c5eaac626a4147ffcb7ddac7472a