Use modern Android libc++ in Yoga and React Native OSS (#39795)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/39795
X-link: https://github.com/facebook/yoga/pull/1412

Android NDK 25 uses a version of libc++ that is more than three years old, missing a lot of basic features of C++ 20. This is rectified in NDK 26 (latest LTS NDK), which brings us up to date with latest Clang (17, released this year), and adds a new policy where future NDK versions will bump libc++ as part of bumping LLVM/Clang.

This requires an a beta AGP version (and corresponding Android Studio Preview). Based on how far we are historically, it wouldn't be a surprise if we see the stable release this month (well before the RN 0.74/Yoga 3.0 cut, even in the worse case).

Changelog:
[Android][Changed] - Use NDK 26

Reviewed By: yungsters

Differential Revision: D49895949

fbshipit-source-id: 37bb4d1fdf81137be7f14f6675b4e079c6f861e4

build.gradle.kts

@@ -30,7 +30,7 @@ version =
 group = "com.facebook.react"
 
 val ndkPath by extra(System.getenv("ANDROID_NDK"))
-val ndkVersion by extra(System.getenv("ANDROID_NDK_VERSION") ?: "25.1.8937393")
+val ndkVersion by extra(System.getenv("ANDROID_NDK_VERSION") ?: "26.0.10792818")
 val sonatypeUsername = findProperty("SONATYPE_USERNAME")?.toString()
 val sonatypePassword = findProperty("SONATYPE_PASSWORD")?.toString()
 

packages/react-native/ReactAndroid/build.gradle

@@ -525,7 +525,6 @@ android {
                     "-DREACT_BUILD_DIR=$buildDir",
                     "-DANDROID_STL=c++_shared",
                     "-DANDROID_TOOLCHAIN=clang",
-                    "-DANDROID_PLATFORM=android-21",
                     // Due to https://github.com/android/ndk/issues/1693 we're losing Android
                     // specific compilation flags. This can be removed once we moved to NDK 25/26
                     "-DANDROID_USE_LEGACY_TOOLCHAIN_FILE=ON"

packages/react-native/ReactAndroid/src/main/jni/third-party/libevent/CMakeLists.txt

@@ -11,6 +11,7 @@ add_compile_options(
         -O2
         -Wno-unused-function
         -Wno-unneeded-internal-declaration
+        -Wno-array-parameter # Fixed in 2.2.1 (not yet released)
         -std=c11)
 
 add_library(event

packages/react-native/ReactCommon/react/renderer/mounting/ShadowTree.cpp

@@ -352,7 +352,7 @@ CommitStatus ShadowTree::commit(
     const CommitOptions& commitOptions) const {
   SystraceSection s("ShadowTree::commit");
 
-  int attempts = 0;
+  [[maybe_unused]] int attempts = 0;
 
   while (true) {
     attempts++;

packages/react-native/gradle/libs.versions.toml

@@ -5,7 +5,7 @@ targetSdk = "34"
 compileSdk = "34"
 buildTools = "34.0.0"
 # Dependencies versions
-agp = "8.1.1"
+agp = "8.2.0-beta06"
 androidx-annotation = "1.6.0"
 androidx-appcompat = "1.6.1"
 androidx-autofill = "1.1.0"

packages/react-native/template/android/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         minSdkVersion = 23
         compileSdkVersion = 34
         targetSdkVersion = 34
-        ndkVersion = "25.1.8937393"
+        ndkVersion = "26.0.10792818"
         kotlinVersion = "1.8.0"
     }
     repositories {