feat: Adopt AGP v9

[hurali97]

Summary

This PR is rasied following the second phase of the RFC around AGP v9 adoption:

RFC: react-native-community/discussions-and-proposals#1006

The gist of this PR is to make Reanimated and Worklets AGP v9 compliant with backward compatibility. The main scope of changes is the react-native-reanimated/android/build.gradle and react-native-worklets/android/build.gradle. The rest of the changes can be considered temporary.

The rest changes include:

• Making Fabric Example App AGP9 compliant
• Upgrade Gradle to v9.4.1
• Use proguard-android-optimize proguard file
• Enable opt outs in the gradle.properties

Ideally, we should not enable the opt outs and leverage the AGP 9 built-in kotlin and newDSL. However, if we do not do it, then other libraries which are not yet AGP v9 compliant starts to fail. Hence, we need to keep the opt outs enabled for a while. For the context, react-native starting from 0.87.x will ship with AGP v9 and opt outs enabled by default for the new apps, which is the first phase of AGP v9 adoption.

With the second phase when the libraries starts adoption AGP v9, we can eventually remove the opt outs from Fabric Example.

Note:

• Upgraded react-native-gesture-handler as the updates contain a fix for not calling rootViewTag as a function invocation

Test plan

To test this PR, we need to do a few steps:

• Set the agp version to 9.2.1 and kotlin to 2.2.0 in react-native-gradle-plugin

--- a/node_modules/@react-native/gradle-plugin/gradle/libs.versions.toml
+++ b/node_modules/@react-native/gradle-plugin/gradle/libs.versions.toml
@@ -1,10 +1,10 @@
 [versions]
-agp = "8.12.0"
+agp = "9.2.1"
 gson = "2.8.9"

-kotlin = "2.1.20"
+kotlin = "2.2.0"
 assertj = "3.25.1"

• Comment out the following functions in react-native-gradle-plugin

--- a/node_modules/@react-native/gradle-plugin/react-native-gradle-plugin/ReactPlugin.kt
+++ b/node_modules/@react-native/gradle-plugin/react-native-gradle-plugin/ReactPlugin.kt
@@ -1,10 +1,10 @@
      configureBuildTypesForApp(project)
    }

    // Library Only Configuration
-    configureBuildConfigFieldsForLibraries(project)
-    configureNamespaceForLibraries(project)
+    // configureBuildConfigFieldsForLibraries(project)
+    // configureNamespaceForLibraries(project)
    project.pluginManager.withPlugin("com.android.library") {

These step is only required because we have RN version on 0.85.2 and AGP + kotlin bump will be shipped with 0.87.x.

Verified on a local RN App with these changes applied

rn-app.mov

Verified by locally patching mmkv, safe-area, etc and making those AGP v9 compliant and removing the opt outs to test the changes in the PR

fabric-agp-9.mp4

Verified these changes work with AGP 8

agp-8.mp4

[hurali97]

This diff is required because with conditional apply, we apparently can not define kotlin.compilerOptions.

Apart from it, we can also safely remove this whole kotlin.compilerOptions thing as it only sets jvmTarget which with AGP 9 defaults to targetCompatibility

[hurali97]

+1

[hurali97]

For AGP - We can define the latest v9.2.1, however this gets overwritten by react-native-gradle-plugin anyways.

For KGP - With AGP 9, this gets overwritten by AGP itself, so we can leave it as is.