[expo-notifications] If unmarshaling notification request fails always try to naively reconstruct the request

[sjchmiela]

Why

Current code doesn't try to reconstruct the notification request if we aren't able to read notification request from the existing byte array which is supposed to hold marshaled notification request. By removing the if-else in favor of …return… we ensure that the method returns a nonnull value for more arguments.

This also lets us override this method in a more natural way.

How

Instead of trying to reconstruct NotificationRequest from StatusBarNotification only if there is no ExpoNotificationBuilder.EXTRAS_MARSHALLED_NOTIFICATION_REQUEST_KEY extra value, let's try to do it if we fail to read the extras value too.

Test Plan

test-suite passes related tests.

[lukmccall]

LGTM 💪💪💪