Epoch timestamp for Last updated on brave://translate-internals

[stephendonner]

Description

Epoch timestamp for Last updated on brave://translate-internals

Steps to Reproduce

1. new profile/install
2. launch Brave
3. open brave://translate-internals on either/both Android and desktop
4. look at the Last updated: timestamp

Actual result:

Last updated: 1969-12-31 16:00:00

Android	desktop

Expected result:

Last updated: 2022-8-18 13:00:00

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.43.74 Chromium: 104.0.5112.102 (Official Build) beta (x86_64)
Revision	8e5396254975ef939f2ef7d0bd334e48a052b536-refs/branch-heads/5112@{#1478}
OS	macOS Version 11.6.8 (Build 20G730)

cc @atuchin-m @bsclifton