[camera_android] Add support to manipulate focus distance and focus mode manually

[abo-el30la]

Use case

in https://pub.dev/packages/camera
I need to manipulate focus distance manually
specifically this feature --
set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_OFF)
set(CaptureRequest.LENS_FOCUS_DISTANCE, value)
these methods are available on android camera2 for CaptureRequest.Builder

thanks in advance

[abo-el30la]

this my try to change LENS_FOCUS_DISTANCE manually

[huycozy]

Hi @abo-el30la
It looks like you are filing a proposal/feature request. Please try to update the issue by the template so it will have better readability.

Issue Template

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## Use case

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Thank you!

[huycozy]

Hi @abo-el30la
Please don't repeat the same description in the comments. I propose a new description as below:

---

Usecase

I need to manipulate focus distance and focus mode manually. These methods are available on android camera2 for CaptureRequest.Builder:

set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_OFF)
set(CaptureRequest.LENS_FOCUS_DISTANCE, value)

Proposal

Support this feature on camera_android

---

If you agree/disagree about this, please write in the comments. Thanks!

[abo-el30la]

yes , I agree

[huycozy]

Thank you for confirming. Labeling this issue as a feature request.

[abo-el30la]

is this feature will be available soon? @stuartmorgan

[stuartmorgan]

Please see https://github.com/flutter/flutter/wiki/Issue-hygiene#when-will-my-bug-be-fixed.