compose: Give better media-picker UI on Android

[chrisbobbe]

See #56 (comment) (referring to what we currently offer on the "Attach images or videos" button in the compose box):

Hmm no, I don't think this is the fancy new PhotoPicker API

Dang, yeah.

That PhotoPicker API is available through image_picker: https://pub.dev/packages/image_picker_android#photo-picker

So that'd be an option. But pending flutter/flutter#89159, it'd lack videos unless we had two separate buttons.

That issue now has a linked PR! 🤞 flutter/packages#3892 So hopefully we can take care of this reasonably soon, by using image_picker instead of file_picker for this.

[gnprice]

And that upstream issue flutter/flutter#89159 is complete (since a few weeks ago). So the first-party image_picker should be able to take care of this for us.

Also the first-party file_selector just grew Android support:

• [file_selector] Add Android support flutter/flutter#110098

We'd noted in #57 that that was missing, which led us to use file_picker there. But now we may be able to replace both uses of file_picker with first-party plugins.

This means there's overlap in functionality between the two first-party plugins file_selector and image_picker:

• Picking from gallery in image_picker could be replaced by file_selector flutter/flutter#128960

Not sure which to use where they overlap. Quite possibly either one would be fine.

[gnprice]

This appears to have been fixed — I just tried the "photo" icon under the compose box, on Android, and got what looks like the fancy new "photo picker" UI.

[gnprice]

Closing because the issue seems to have been fixed.

I am puzzled as to what would have fixed it, though:

• The code sure looks like we're still using package:file_picker for that button.
• There's nothing in that package's changelog that looks relevant: https://pub.dev/packages/file_picker/changelog
• I only find one related issue in that package's issue tracker… and it's an open issue asking for precisely this feature, filed just a week ago: Android 14 (Api Sdk 34):Implementing support for Photo Picker Selected Photos/Videos Access feature. miguelpruivo/flutter_file_picker#1559