Makes Java style improvements that roughly follow https://google.github.io/styleguide/javaguide.html.

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… marker and deprecate zIndex (#9372)

*List which issues are fixed by this PR. You must list at least one issue.*
This is just the platform interface package part of #8012 

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… objects when app is under memory pressure (#9287)

~~*Note:* Waiting on #9264 to land and to regenerate baseline file with.~~

This bumps `pigeon` to `25.3.2` and regenerates the code to fix a bug where native objects were getting garbage collected prematurely. See flutter/flutter#168531

Fixes flutter/flutter#152763

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- [s] All existing and new tests are passing.

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Rolls Flutter master pin to 8b18dde77fa59ba7f87540c05d1aba787198e77a

Manual version of #9335

first step of fixing [#106790](flutter/flutter#106790)

This PR  changes the generation to use a mixin instead of an extension. The plan is to add the routing methods directly to `GoRouteData`. An extension won't be able to override the class implementations, so I changed it to a mixin.

I'm not sure about the versioning, so feel free to suggest changes.

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Migrates camera implementation as part of flutter/flutter#119109

This PR migrates a part of `FLTCam` class to Swift. To avoid migrating the whole huge class to Swift at once and a refactor that we don't have a budget for we are extending the `FLTCam` class in swift (`DefaultCamera`). We will now migrate the methods in smaller chunks.

This PR includes the first chunk:
- `captureOutput` (from `AVCaptureVideoDataOutputSampleBufferDelegate`, `AVCaptureAudioDataOutputSampleBufferDelegate` protocols)
- `copyPixelBuffer` (from `FlutterTexture` protocol)

Some properties of the `FLTCam` have to be temporarily made public so that they are accessible in `DefaultCamera`.

The `DefaultCamera` class conforms to the new `Camera` protocol. A few properties defined in `FLTCam` are now marked  `nullable` to match the `Camera` protocol and the reality.

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