Handle startProfile failure during creation of private space

This includes to verify return value of startProfile to check if profile
is started successfully. If startProfile failed for any reason then
delete the created profile and return false for createPrivateProfile().

Bug: 313926659
Test: atest PrivateSpaceMaintainerTest
Change-Id: I493cb3a41cef8bdc1be42fe328c4f7bd04944b94