Fix aspect ratio issues in preview

[wkmeijer]

This minor change fixes the display of black bars on multiple devices, caused by a wrongly set aspect ratio. This should fix the problems mentioned in issues #69 #66 and possibly #38 and #9 .

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[wkmeijer]

Signed it.

[googlebot]

CLAs look good, thanks!

[PoloShock]

This results in cropped preview on my Sony Xperia Z3 Tablet Compact.
More specifically, there is only part of the original preview after applying the change. The rest is not displayed since it doesn't fit.

[ShreyashPromact]

For some devices, it looks like working fine and for some it not.

[returnZro]

This fix just crops the image of higher resolution in preview. When you retrieve the saved image, its not what exactly shown in the preview.

[yudikarma]

@rameshbabudevalingam hei, you get some idea to fix that ? i hava some problem cause my imagesave not what exactly shown in the preview. thanks

[codingjeremy]

This sample has been migrated to a new location where we can accept Pull Requests (check README for more information).

As recommended by GitHub, we are closing all issues and pull requests now that this older repo will be archived.

If you still see this issue in the updated repo, please reopen the issue/PR there. Thank you!