Merge "Keep finalized staged sessions in session database" into qt-dev

        synchronized (mLock) {

            assertCallerIsOwnerOrRootLocked();

            if (isStagedAndInTerminalState()) {

                // We keep the session in the database if it's in a finalized state. It will be

                // removed by PackageInstallerService when the last update time is old enough.

                // Also, in such cases cleanStageDir() has already been executed so no need to

                // do it now.

                return;

            }

            if (mCommitted && params.isStaged) {

                synchronized (mLock) {

                    mDestroyed = true;