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Setting pictureSize on the Camera doesn't really affect the size of the image taken

See original GitHub issue

Environment

Expo CLI 2.3.8 environment info:
    System:
      OS: macOS 10.14
      Shell: 3.2.57 - /bin/bash
    Binaries:
      Node: 8.9.4 - ~/.nvm/versions/node/v8.9.4/bin/node
      npm: 5.6.0 - ~/.nvm/versions/node/v8.9.4/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    IDEs:
      Android Studio: 2.2 AI-145.3537739
      Xcode: 9.2/9C40b - /usr/bin/xcodebuild
    npmPackages:
      expo: ^30.0.1 => 30.0.1
      react: 16.3.1 => 16.3.1
      react-native: https://github.com/expo/react-native/archive/sdk-30.0.0.tar.gz => 0.55.4
      react-navigation: ^2.18.0 => 2.18.0
    npmGlobalPackages:
      expo-cli: 2.3.8

  Diagnostics report:
    https://exp-xde-diagnostics.s3.amazonaws.com/bberak-d7a0d137-25a7-43ea-9878-51ff2b1ff551.tar.gz

iOS - using iPhone SE with iOS 12.1

Steps to Reproduce

Run the following snack on a physical device: https://snack.expo.io/@bberak/photo-size-bug .The snack is a copy + paste of the camerja example - with a simple alert for printing the size of the take photo.
Open the photo size menu (... on the bottom left).
Select various photo size and take a snap.
After each snap, you will see an alert box that prints the widht and height of the photo.

Expected Behavior

I expect the size output from the alert box to correlate somewhat with the selected photo size in the menu. Eg, taking a ‘1280x720’ shot would result in a photo that is 720 in width and 1280 in height (in portrait mode).

Actual Behavior

The size of the photo is always 2304 x 4090 (approx) in portrait mode - regardless of the selected photo size in the menu. If you take the photo in landscape mode, the photo is always 4090 x 2304 (approx).