HACK: allow building with incompat JDK 17

Change-Id: I83fbf8b54a564682ec34a4dd7890d7626a67892d

Author: kxxt

gradle.properties

@@ -26,4 +26,6 @@ ndkVersion=22.1.7171670
 compileSdkVersion=30
 
 markwonVersion=4.6.2
+# allow JDK17
+org.gradle.jvmargs=-Xmx1536M --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED