Merge "Ignore potential SystemProperties errors when setting net.dns"

        int last = 0;

        for (InetAddress dns : dnses) {

            ++last;

            String key = "net.dns" + last;

            String value = dns.getHostAddress();

            mSystemProperties.set(key, value);

            setNetDnsProperty(last, dns.getHostAddress());

        }

        for (int i = last + 1; i <= mNumDnsEntries; ++i) {

            String key = "net.dns" + i;

            mSystemProperties.set(key, "");

            setNetDnsProperty(i, "");

        }

        mNumDnsEntries = last;

    }

    private void setNetDnsProperty(int which, String value) {

        final String key = "net.dns" + which;

        // Log and forget errors setting unsupported properties.

        try {

            mSystemProperties.set(key, value);

        } catch (Exception e) {

            Log.e(TAG, "Error setting unsupported net.dns property: ", e);

        }

    }

    private String getNetworkPermission(NetworkCapabilities nc) {

        // TODO: make these permission strings AIDL constants instead.

        if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {