4756970d3f
Failure to enable rollback for one of the packages in a multi-package install should fail to enable rollback for all packages in the multi-package install. That was not the case prior to this CL, which could lead to partial rollbacks. Keep track of how many child sessions we expect to enable rollback for and double check that we succeeded before making the rollback available. This involves some cleanup of how we track parent vs child sessions when enabling rollback. Bug: 128656191 Test: atest RollbackTest, with new test added. Change-Id: I737896cdc1915396748c5c1959b5397af793258a