Fixed NPE in ActivityManager's launch count service.

                return new HashMap<String, Integer>();

            }

            PkgUsageStats[] allPkgUsageStats = usageStatsService.getAllPkgUsageStats();

            if (allPkgUsageStats == null) {

                return new HashMap<String, Integer>();

            }

            Map<String, Integer> launchCounts = new HashMap<String, Integer>();

            for (PkgUsageStats pkgUsageStats : usageStatsService.getAllPkgUsageStats()) {

            for (PkgUsageStats pkgUsageStats : allPkgUsageStats) {

                launchCounts.put(pkgUsageStats.packageName, pkgUsageStats.launchCount);

            }