[WebNFC] Distinguish between NFC not available and not enabled

Following spec change at w3c/web-nfc#237, this
CL allows web developers to distinguish when NFC is not available and
when it's disabled by user preference.

Bug: 520391
Change-Id: I3927d855edef1b1cf9b2036a0b4991745b962e04
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1751948
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Reviewed-by: Dominick Ng <dominickn@chromium.org>
Reviewed-by: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Cr-Commit-Position: refs/heads/master@{#686762}

web-nfc/nfc_hw_disabled-manual.https.html

@@ -26,12 +26,12 @@ <h2>Precondition</h2>
   const readerWatcher = new EventWatcher(t, reader, ["reading", "error"]);
   reader.start();
   const event = await readerWatcher.wait_for("error");
-  assert_equals(event.error.name, 'NotReadableError');
+  assert_equals(event.error.name, 'NotSupportedError');
 }, "NFCReader.start should fail if NFC HW is disabled.");
 
 promise_test(t => {
   const writer = new NFCWriter();
-  return promise_rejects(t, 'NotReadableError', writer.push(test_text_data));
+  return promise_rejects(t, 'NotSupportedError', writer.push(test_text_data));
 }, "NFCWriter.push should fail when NFC HW is disabled.");
 
 </script>