Merge "Fix NPE in package manager when asserting overlays" into pi-dev

                                mSettings.getPackageLPr(pkg.packageName),

                                "previous package state not present");

                        // previousPkg.pkg may be null: the package will be not be scanned if the

                        // package manager knows there is a newer version on /data.

                        // TODO[b/79435695]: Find a better way to keep track of the "static"

                        // property for RROs instead of having to parse packages on /system

                        PackageParser.Package ppkg = previousPkg.pkg;

                        if (ppkg == null) {

                            try {

                                final PackageParser pp = new PackageParser();

                                ppkg = pp.parsePackage(previousPkg.codePath,

                                        parseFlags | PackageParser.PARSE_IS_SYSTEM_DIR);

                            } catch (PackageParserException e) {

                                Slog.w(TAG, "failed to parse " + previousPkg.codePath, e);

                            }

                        }

                        // Static overlays cannot be updated.

                        if (previousPkg.pkg.mOverlayIsStatic) {

                        if (ppkg != null && ppkg.mOverlayIsStatic) {

                            throw new PackageManagerException("Overlay " + pkg.packageName +

                                    " is static and cannot be upgraded.");

                        // Non-static overlays cannot be converted to static overlays.