fix(android): Use safeExtGet for compileSdkVersion in expo-handler (#6061)

* fix(android): Use safeExtGet for compileSdkVersion in expo-handler

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* meta: Add changelog entry for expo-handler compileSdkVersion fix

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Changelog

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: lucas-zimerman

CHANGELOG.md

@@ -15,6 +15,7 @@
 
 ### Fixes
 
+- Android build failure in `expo-handler` when Android SDK 31 is not installed by using `safeExtGet` for `compileSdkVersion` and `minSdkVersion` ([#6061](https://github.com/getsentry/sentry-react-native/pull/6061))
 - Stop the Hermes sampling profiler on React instance teardown to prevent `pthread_kill` SIGABRT when the JS thread is torn down with profiling active ([#6035](https://github.com/getsentry/sentry-react-native/pull/6035))
 - Restrict the URI scope of `getDataFromUri` on iOS and Android ([#6045](https://github.com/getsentry/sentry-react-native/pull/6045))
 - Restrict the Metro source-context middleware to files within the project root ([#6044](https://github.com/getsentry/sentry-react-native/pull/6044))

packages/core/android/expo-handler/build.gradle

@@ -1,11 +1,15 @@
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 31
+    compileSdkVersion safeExtGet('compileSdkVersion', 31)
     namespace = "io.sentry.react.expo"
 
     defaultConfig {
-        minSdkVersion 21
+        minSdkVersion safeExtGet('minSdkVersion', 21)
     }
 
     compileOptions {