[Android] Crash when displaying large images (Pixel 8 Pro, Android 15) — Canvas: trying to draw too large bitmap

**Describe the bug**
When trying to send or view a high-resolution image (6144x8160 pixels, taken with Pixel 8 Pro 50MP camera) in a chat, Keybase crashes with the error:
java.lang.RuntimeException: Canvas: trying to draw too large(200540160bytes) bitmap.

The image is around 7.6MB on disk (JPEG), but when Android tries to draw it, it uses ~200MB RAM because of the pixel dimensions.
The crash happens immediately after adding the photo.

**To Reproduce**
Steps to reproduce the behavior:
Go to any chat
Click on Camera button > Photo from library > pick a Pixel 50MP picture (6144x8160)
Add it to the chat
App crashes on load

**Expected behavior**
The app should properly downscale large images before rendering them, to prevent Canvas from crashing.

**Additional numbers**
The number 345567

Start by reproducing the crash from any chat through Camera > Photo from library with a 6144x8160 Pixel 50MP image. Trace where the selected image is loaded before rendering; done means the image is downscaled before Android Canvas draws it and the app no longer crashes.

Written by the indexing model from the issue text.