chore: remove android test on java8

.github/workflows/android-ci.yml

@@ -16,7 +16,11 @@ jobs:
     continue-on-error: true
     strategy:
       matrix:
-        java_version: [8, 11, 17, 21]
+        # Gradle 7 removed maven plugin, but the latest Android plugin compatible with Java 8 need it
+        # so we can't test Android on Java 8 with Gradle 7+
+        # https://docs.gradle.org/7.0/userguide/upgrading_version_6.html#removal_of_the_legacy_maven_plugin
+        # https://mvnrepository.com/artifact/com.android.tools.build/gradle
+        java_version: [11, 17, 21]
     steps:
       - uses: actions/checkout@v4
         with: