bluetooth: Implement getAvailability()

This change implements the getAvailability() method for
navigator.bluetooth as defined in the specification.

Bug: 707640
Change-Id: I9e9b3e7f8ea7f259e975f71cb6d9570e5f04b479
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1651516
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Ovidio de Jesús Ruiz-Henríquez <odejesush@chromium.org>
Auto-Submit: Ovidio de Jesús Ruiz-Henríquez <odejesush@chromium.org>
Cr-Commit-Position: refs/heads/master@{#688987}
bool MatchesFilters(
    const std::string* device_name,
    const UUIDSet& device_uuids,
    const base::Optional<
        std::vector<blink::mojom::WebBluetoothLeScanFilterPtr>>& filters) {
  DCHECK(!HasEmptyOrInvalidFilter(filters));
  for (const auto& filter : filters.value()) {
    if (MatchesFilter(device_name, device_uuids, filter)) {
      return true;
    }
  }
  return false;
}

bool MatchesFilters(
    const std::string* device_name,
    const UUIDSet& device_uuids,
    const base::Optional<
        std::vector<blink::mojom::WebBluetoothLeScanFilterPtr>>& filters) {
  DCHECK(!HasEmptyOrInvalidFilter(filters));
  for (const auto& filter : filters.value()) {
    if (MatchesFilter(device_name, device_uuids, filter)) {
      return true;
    }
  }
  return false;
}
