Set queue on accessibility announcements in OfflineNoticeProvider

[burnerlee]

This is a followup to zulip/zulip-mobile#5344 (once that upgrade is done, as in zulip/zulip-mobile#5610.) We have the following TODO-react-native comments in OfflineNoticeProvider.js:

  // TODO(react-native-68): Use announceForAccessibilityWithOptions to
  //   queue this behind any in-progress announcements
  AccessibilityInfo.announceForAccessibility(_('Zulip’s Internet connection is uncertain.'));

// …
// TODO(react-native-68): Use announceForAccessibilityWithOptions to
// queue this behind any in-progress announcements
AccessibilityInfo.announceForAccessibility(_('Zulip is online.'));
That's referring to this new feature in RN v0.68:
https://reactnative.dev/docs/0.68/AccessibilityInfo#announceforaccessibilitywithoptions

By default announcements will interrupt any existing speech, but on iOS they can be queued behind existing speech by setting queue to true in the options object.

That would be a nice, small, polish tweak.

[burnerlee]

@dashwave-ci-dev /fix

[burnerlee]

@dashwave-ci-dev /fix

[burnerlee]

@dashwave-ci-dev /fix

[burnerlee]

@dashwave-ci-dev /fix

[burnerlee]

@dashwave-ci-dev /fix

[burnerlee]

@dashwave /fix

[burnerlee]

@dashwave /fix

[burnerlee]

@dashwave /fix

[burnerlee]

@dashwave /fix

[burnerlee]

@dashwave /fix

[murex971]

@dashwave /fix

[murex971]

@dashwave /fix

[murex971]

@dashwave /fix

[murex971]

@dashwave /fix