[Feature Request]: Built-in Photo Viewer

Guidelines

• I have searched the issue tracker for open and closed issues that are similar to the feature request I want to file, without success.
• This issue contains only one feature request.

Problem Description

Whenever the user taps an image, they're prompted to open it via an external (gallery) app, which could unintentionally create a thumbnail cache for said photo for the app in question. Also, the external app may not use FLAG_SECURE, which renders the 'Block screenshots' feature useless.

Proposed Solution

Create a simple built-in photo viewer.

Alternatives Considered

null

Additional Information

No response