[various] Plugin Gradle pre-Kotlin standardization

[stuartmorgan-g]

As a precursor to converting plugins to use Kotlin Gradle build files in #11172, this does some final standardization of the Groovy versions:

• Uses " instead of ' on more lines.
• Uses (...) and = in places where it's optional, instead of just a space.
• Uses minSdk instead of minSdkVersion.
• Standardizes vertical whitespace (not necessary for the conversion, but it's something I cleaned up in that PR).

This is being done as a precursor PR because I noticed that the files are mostly right on the cusp of being similar enough for git to think they are renames with changes rather than deletion and addition; some are ending up one way, and some the other. Since renames with changes make blame much more useful, I'd like to make the files more similar so that hopefully almost all of them will end up as renames with changes in that PR.

Pre-Review Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter.
• I signed the CLA.
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I linked to at least one issue that this PR fixes in the description above.
• I followed the version and CHANGELOG instructions, using semantic versioning and the repository CHANGELOG style, or I have commented below to indicate which documented exception this PR falls under¹.
• I updated/added any relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or I have commented below to indicate which test exemption this PR falls under¹.
• All existing and new tests are passing.

Footnotes

1. Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling. ↩ ↩²

[stuartmorgan-g]

Version/changelog override: I'm intentionally not releasing these since the changes are no-ops in practice, and we'll be releasing all of these changes almost immediate afteward as part of #11172.

[stuartmorgan-g]

@gmackall This just needs a quick rubber stamp to streamline the next PR in the conversion series.

[gemini-code-assist]

Code Review

This pull request performs a broad standardization of Groovy Gradle build files across numerous packages. The changes apply more modern Gradle DSL syntax, such as using double quotes, parentheses for method calls, the = for assignments, and updating properties like minSdkVersion to minSdk and lintOptions to lint, in preparation for a migration to Kotlin Gradle files.

The standardization appears to be incomplete for packages/local_auth/local_auth_android/android/build.gradle. This file still contains older syntax (e.g., single quotes for group and version, and method calls without parentheses) that has been updated in other files in this PR. Applying the standardization consistently to all files would better achieve the PR's stated goal.

[stuartmorgan-g]

The standardization appears to be incomplete for packages/local_auth/local_auth_android/android/build.gradle.

local_auth wasn't supposed to be included, to avoid conflicts with #11169. Reverted.

[tarrinneal]

"''"