Merge "Check for exported and category before starting activity." into lmp-dev

            Intent launchIntent = new Intent(Intent.ACTION_MAIN);

            launchIntent.addCategory(Intent.CATEGORY_LAUNCHER);

            launchIntent.setComponent(component);

            launchIntent.setSourceBounds(sourceBounds);

            launchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            launchIntent.setPackage(component.getPackageName());

            long ident = Binder.clearCallingIdentity();

            try {

                IPackageManager pm = AppGlobals.getPackageManager();

                ActivityInfo info = pm.getActivityInfo(component, 0, user.getIdentifier());

                if (!info.exported) {

                    throw new SecurityException("Cannot launch non-exported components "

                            + component);

                }

                // Check that the component actually has Intent.CATEGORY_LAUCNCHER

                // as calling startActivityAsUser ignores the category and just

                // resolves based on the component if present.

                List<ResolveInfo> apps = mPm.queryIntentActivitiesAsUser(launchIntent,

                        PackageManager.NO_CROSS_PROFILE, // We only want the apps for this user

                        user.getIdentifier());

                final int size = apps.size();

                for (int i = 0; i < size; ++i) {

                    ActivityInfo activityInfo = apps.get(i).activityInfo;

                    if (activityInfo.packageName.equals(component.getPackageName()) &&

                            activityInfo.name.equals(component.getClassName())) {

                        // Found an activity with category launcher that matches

                        // this component so ok to launch.

                        launchIntent.setComponent(component);

                        mContext.startActivityAsUser(launchIntent, opts, user);

                        return;

                    }

                }

                throw new SecurityException("Attempt to launch activity without "

                        + " category Intent.CATEGORY_LAUNCHER " + component);

            } finally {

                Binder.restoreCallingIdentity(ident);

            }