Long press on an item in the Aztec media picker results in a blank screen or an "unable to load media" message

[designsimply]

Steps to reproduce:

1. Start a new post.
2. Tap to add media.
3. Long press on a device image or video.

Result: a long-press on an item in the Aztec media picker results in a blank screen for a video or a message that says "unable to load media" for an image. (35s)

^{Tested with WPAndroid 13.8-rc-1 on Pixel 3 Android 10.}

^{/hat tip @nbradbury for the original report at https://github.com/wordpress-mobile/WordPress-Android/issues/7011 on Dec 20, 2017.}