Patch in a placeholder to "download" the gradle distfile from the place
where MacPorts has already downloaded it.
--- gradle/wrapper/gradle-wrapper.properties.orig	2022-05-23 14:21:51.000000000 -0500
+++ gradle/wrapper/gradle-wrapper.properties	2023-10-19 02:21:44.000000000 -0500
@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
+distributionUrl=file\://@DISTPATH@/gradle-7.3.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists