flutter doctor should explicitly say when it can't find Android Studio version

[gnprice]

When the tool isn't able to identify what version an Android Studio installation is, that can cause the build to fail because some logic depends on the Android Studio version. For example:

• Explicitly configured Android Studio is always treated as ancient version, breaking build #121468
• Tool can't parse version of Android Studio Preview on macOS #121925

So when someone's running flutter doctor -v because things have gone wrong, the fact that the Android Studio version couldn't be identified is potentially a quite important clue for resolving the problem.

Currently, though, the flutter doctor output just suppresses mention of the version when it doesn't know the answer:

    // in [AndroidStudioValidator.validate]
    final String? studioVersionText = _studio.version == Version.unknown
      ? null
      : userMessages.androidStudioVersion(_studio.version.toString());

The result is a line like

[!] Android Studio

instead of like

[✓] Android Studio (version 2022.3)

This is too subtle; e.g. in #121925 it wasn't noticed in the first few rounds of debugging. It should instead say something like:

[!] Android Studio (unknown version)

or perhaps somewhat louder than that.

[christopherfujino]

cc @andrewkolos

[andrewkolos]

This likely applies to the VSCode validator as well:

flutter/packages/flutter_tools/lib/src/vscode/vscode_validator.dart

Lines 27 to 29 in 0916375

	final String? vsCodeVersionText = _vsCode.version == Version.unknown
	? null
	: userMessages.vsCodeVersion(_vsCode.version.toString());

[github-actions]

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