Align jvmTarget usages across codebase, while editing build.gradle files align them with android version documentation (#164200)

Related to #149836
Find all jvmTarget definitions that do not use JavaVersion.* then update
them.
While editing those files align the usages with
docs/contributing/Android-API-And-Related-Versions.md.

Documentation source that this pr follows
https://github.com/flutter/flutter/pull/164198/files#diff-ee6ec18be8d752e2696c8ccc8bec2f202dfc29a43b3b4f9d8041aa6bc3e852a1


This pr is expected to cause no behavioral changes.
This pr makes logical sense after
https://github.com/flutter/flutter/pull/164198 but can be landed in any
order.

## Pre-launch Checklist

- [x] I read the [Contributor Guide] and followed the process outlined
there for submitting PRs.
- [x] I read the [Tree Hygiene] wiki page, which explains my
responsibilities.
- [x] I read and followed the [Flutter Style Guide], including [Features
we expect every widget to implement].
- [x] I signed the [CLA].
- [x] I listed at least one issue that this PR fixes in the description
above.
- [x] I updated/added relevant documentation (doc comments with `///`).
- [ ] I added new tests to check the change I am making, or this PR is
[test-exempt].
- [x] I followed the [breaking change policy] and added [Data Driven
Fixes] where supported.
- [x] All existing and new tests are passing.

dev/benchmarks/multiple_flutters/android/app/build.gradle

@@ -14,7 +14,7 @@ android {
     }
 
     namespace "dev.flutter.multipleflutters"
-    compileSdk 35
+    compileSdk = 35
 
     // Flutter's CI installs the NDK at a non-standard path.
     // This non-standard structure is initially created by
@@ -26,20 +26,20 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
     }
 
     kotlinOptions {
-        jvmTarget = '17'
+        jvmTarget = JavaVersion.VERSION_17.toString()
     }
 
     defaultConfig {
         applicationId "dev.flutter.multipleflutters"
-        minSdkVersion 24
-        targetSdkVersion 35
-        versionCode 1
-        versionName "1.0"
+        minSdk = 24
+        targetSdk = 35
+        versionCode = 1
+        versionName = "1.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }