Add ManagedProfileLifecycleStressTest#testCreateStartDeleteStable

Added a similar test to
ManagedProfileLifecycleStressTest#testCreateStartDelete but with
waitForBroadcastIdle after each user operation. This is just a temp
test to identify if adding the sleeps after user operations reduces
flakiness.

Test: atest ManagedProfileLifecycleStressTest
Change-Id: I6ace688694248f61489d31148777031bd383c887