build(android): pin Gradle JVM to JDK 21

Matthias Nott

2026-06-11 e74303c9bed248d6dd3f0440223c1edd297eb4e9

 android/gradle.properties
..
..
@@ -1,2 +1,6 @@
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 org.gradle.jvmargs=-Xmx8G -XX:MaxMetaspaceSize=4G -XX:ReservedCodeCacheSize=512m -XX:+HeapDumpOnOutOfMemoryError
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 android.useAndroidX=true
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+# System default Java is 25 — the Kotlin compiler bundled by AGP can't parse
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+# that version string yet ("IllegalArgumentException: 25.0.2"). Pin Gradle to
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+# Java 21 (LTS, fully supported).
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+org.gradle.java.home=/opt/homebrew/Cellar/openjdk@21/21.0.11/libexec/openjdk.jdk/Contents/Home