If you take mobile security seriously (and you should), then you might want to consider file encryption. This is all about encrypting files that you can either leave on your device and view when needed or share with others, knowing they can be viewed only by the recipient.
What I walked through wasn't just an immigration gate. It was a node in a rapidly expanding global infrastructure of digital identity, one being constructed at extraordinary speed, across dozens of countries, by a mix of governments, multilateral organizations, and private technology vendors. The people building it believe they are solving real problems: fraud, statelessness, inefficient public services, financial exclusion.
While you're thinking about third-party add-ons for your computer and phone, take a moment to review everything you have installed on both fronts and consider how many of those programs you actually still use. The fewer cracked windows you allow on your Google account, the better - and if you aren't even using something, there's no reason to keep it connected.