Allow staging multiple sessions with non-overlapping packages (apk+apex) am: ca438ddb

                            PackageManager.INSTALL_FAILED_OTHER_STAGED_SESSION_IN_PROGRESS,

                            "Cannot stage multiple sessions without checkpoint support", null);

                }

                // TODO:b/141843321 Add support for staging multiple sessions in apexd

                // Since apexd doesn't support multiple staged sessions yet, we have to careful how

                // we handle apex sessions. We want to allow a set of apex sessions under the same

                // parent to be staged when there is no previously staged apex sessions.

                if (isApexSession(session) && isApexSession(stagedSession)) {

                    // session is apex and it can co-exist with stagedSession only if they are from

                    // same parent

                    final boolean coExist;

                    if (!session.hasParentSessionId() && !stagedSession.hasParentSessionId()) {

                        // Both single package apex sessions. Cannot co-exist.

                        coExist = false;

                    } else {

                        // At least one of the session has parent. Both must be from same parent.

                        coExist =

                                session.getParentSessionId() == stagedSession.getParentSessionId();

                    }

                    if (!coExist) {

                        throw new PackageManagerException(

                                PackageManager.INSTALL_FAILED_OTHER_STAGED_SESSION_IN_PROGRESS,

                                "Package: " + session.getPackageName() + " in session: "

                                        + session.sessionId + " cannot be staged as there is "

                                        + "already another apex staged session: "

                                        + stagedSession.sessionId, null);

                    }

                }

            }

        }

    }