Fix :ReactAndroid:androidJavadoc task (#30417)

Summary:
Fixes https://github.com/facebook/react-native/issues/30415

This is a quick and dirty fix to unblock publish, of excluding a class from Javadoc generation that is importing a class current build logic cannot handle. This is not a long-term fix for the issue.

## Changelog

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[Internal] [Fixed] - Fix :ReactAndroid:androidJavadoc task

Pull Request resolved: https://github.com/facebook/react-native/pull/30417

Test Plan: Tested that the task now completes locally.

Reviewed By: lunaleaps

Differential Revision: D25041282

Pulled By: fkgozali

fbshipit-source-id: f774ab30a09db473178e2a51c77860e4985dd8e3

ReactAndroid/release.gradle

@@ -73,12 +73,12 @@ if (JavaVersion.current().isJava8Compatible()) {
 
 afterEvaluate { project ->
 
-    task androidJavadoc(type: Javadoc) {
+    task androidJavadoc(type: Javadoc, dependsOn: generateReleaseBuildConfig) {
         source = android.sourceSets.main.java.srcDirs
         classpath += files(android.bootClasspath)
         classpath += files(project.getConfigurations().getByName("compile").asList())
+        classpath += files("$buildDir/generated/source/buildConfig/release")
         include("**/*.java")
-        exclude("**/ReactBuildConfig.java")
     }
 
     task androidJavadocJar(type: Jar, dependsOn: androidJavadoc) {