[Image_picker_android] example app ping video player version

[cyanglaz]

Ping the video player version in the example app, video_player 2.3.5 might conflict image_picker.

Fixes: flutter/flutter#105182

No CHANGELOG change: example app only change.

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[GaryQian]

Does this require a minor version bump? Im not clear of the convention in plugins yet.

[cyanglaz]

@GaryQian No version bump required. this is only for example app.

I'm just testing the failure in this PR tho. The real fix might not be this as all the apps that depends on the latest image_picker and latest video_players would have the same build issue (if the issue is really due to video_playing updating the deps)

We will need to find a better fix for this.

[cyanglaz]

The image picker issue is fixed by #5889