Fix devDisabledInStaging not working with multiple productFlavors (#30606)

Summary:
Fixes https://github.com/facebook/react-native/issues/27052

Since react-native 0.62, the `devDisabledIn${buildType}` syntax has stopped working for apps with multiple `productFlavors`. This PR adds the `disableDevForVariant` lambda to allow dev mode to be disabled for different variants.

## Changelog

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[Android] [Fixed] - Fix devDisabledIn not working with multiple productFlavors

Pull Request resolved: https://github.com/facebook/react-native/pull/30606

Test Plan:
I added the following log into `react.gradle` and ran the Android build for my app:

```
println("devEnabled: ${targetName}, ${devEnabled}")
```

```
# build.gradle

project.ext.react = [
    entryFile: "index.android.js",
    enableHermes: true,  // clean and rebuild if changing
    bundleInLive: true,
    disableDevForVariant: {
         def variant -> variant.name.toLowerCase().contains('release') || variant.name.toLowerCase().contains('live')
    },
]

...

flavorDimensions 'branding'
productFlavors {
    cve {
        dimension 'branding'
    }
    whce {
        dimension 'branding'
    }
}
```

Console output:

```
Reading env from: env/cve/live
devEnabled: CveDebug, true
devEnabled: CveRelease, false
devEnabled: CveLive, false
devEnabled: WhceDebug, true
devEnabled: WhceRelease, false
devEnabled: WhceLive, false
```

Reviewed By: cortinico

Differential Revision: D31649977

Pulled By: ShikaSD

fbshipit-source-id: 520734314f4bca7608b8dca67c7c5ce0be6d31a5

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/ReactExtension.kt

@@ -114,6 +114,14 @@ abstract class ReactExtension @Inject constructor(project: Project) {
   val devDisabledInVariants: ListProperty<String> =
       objects.listProperty(String::class.java).convention(emptyList())
 
+  /**
+   * Functional interface to disable dev mode only on specific [BaseVariant] Default: will check
+   * [devDisabledInVariants] or return True for Release variants and False for Debug variants.
+   */
+  var disableDevForVariant: (BaseVariant) -> Boolean = { variant ->
+    variant.name in devDisabledInVariants.get() || variant.isRelease
+  }
+
   /**
    * Variant Name to Boolean map that allows to toggle the bundle command for a specific variant.
    * Default: {}

packages/react-native-gradle-plugin/src/main/kotlin/com/facebook/react/TaskConfiguration.kt

@@ -64,7 +64,7 @@ internal fun Project.configureReactTasks(variant: BaseVariant, config: ReactExte
             }
         it.execCommand = execCommand
         it.bundleCommand = config.bundleCommand.get()
-        it.devEnabled = !(variant.name in config.devDisabledInVariants.get() || isRelease)
+        it.devEnabled = !config.disableDevForVariant(variant)
         it.entryFile = detectedEntryFile(config)
 
         val extraArgs = mutableListOf<String>()

react.gradle

@@ -99,6 +99,12 @@ def hermesFlagsForVariant = config.hermesFlagsForVariant ?: {
         return hermesFlags
 }
 
+// Set disableDevForVariant to a function to configure per variant,
+// defaults to `devDisabledIn${targetName}` or True for Release variants and False for debug variants
+def disableDevForVariant = config.disableDevForVariant ?: {
+    def variant -> config."devDisabledIn${variant.name.capitalize()}" || variant.name.toLowerCase().contains("release")
+}
+
 // Set deleteDebugFilesForVariant to a function to configure per variant,
 // defaults to True for Release variants and False for debug variants
 def deleteDebugFilesForVariant = config.deleteDebugFilesForVariant ?: {
@@ -172,8 +178,7 @@ afterEvaluate {
             workingDir(reactRoot)
 
             // Set up dev mode
-            def devEnabled = !(config."devDisabledIn${targetName}"
-                || targetName.toLowerCase().contains("release"))
+            def devEnabled = !disableDevForVariant(variant)
 
             def extraArgs = []