Merge "Add permission check functions to NetworkStatsService" into rvc-dev

import static android.content.Intent.ACTION_UID_REMOVED;

import static android.content.Intent.ACTION_USER_REMOVED;

import static android.content.Intent.EXTRA_UID;

import static android.content.pm.PackageManager.PERMISSION_GRANTED;

import static android.net.ConnectivityManager.ACTION_TETHER_STATE_CHANGED;

import static android.net.ConnectivityManager.isNetworkTypeMobile;

import static android.net.NetworkStack.checkNetworkStackPermission;

        }

    }

    // TODO: It is copied from ConnectivitySerivce, consider refactor these check permission

    //  functions to a proper util.

    private boolean checkAnyPermissionOf(String... permissions) {

        for (String permission : permissions) {

            if (mContext.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {

                return true;

            }

        }

        return false;

    }

    private void enforceAnyPermissionOf(String... permissions) {

        if (!checkAnyPermissionOf(permissions)) {

            throw new SecurityException("Requires one of the following permissions: "

                    + String.join(", ", permissions) + ".");

        }

    }

    /**

     * Registers a custom provider of {@link android.net.NetworkStats} to combine the network

     * statistics that cannot be seen by the kernel to system. To unregister, invoke the