fix gradle.properties in java client (#21129)

Author: wing328

modules/openapi-generator/src/main/resources/kotlin-client/libraries/jvm-volley/gradle.properties.mustache

@@ -1,4 +1,12 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+#
 android.useAndroidX=true
 {{#generateRoomModels}}
 android.enableJetifier=true
 {{/generateRoomModels}}
+{{#gradleProperties}}
+{{{.}}}
+{{/gradleProperties}}

samples/client/echo_api/java/native/gradle.properties

@@ -0,0 +1,6 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+# For example, uncomment below to build for Android
+#target = android

samples/client/petstore/java/native-async/gradle.properties

@@ -0,0 +1,6 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+# For example, uncomment below to build for Android
+#target = android

samples/client/petstore/java/native-jakarta/gradle.properties

@@ -0,0 +1,6 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+# For example, uncomment below to build for Android
+#target = android

samples/client/petstore/java/native/gradle.properties

@@ -0,0 +1,6 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+# For example, uncomment below to build for Android
+#target = android

samples/client/petstore/kotlin-array-simple-string-jvm-volley/gradle.properties

@@ -1 +1,6 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+#
 android.useAndroidX=true

samples/client/petstore/kotlin-default-values-jvm-volley/gradle.properties

@@ -1,2 +1,7 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+#
 android.useAndroidX=true
 android.enableJetifier=true

samples/client/petstore/kotlin-jvm-volley/gradle.properties

@@ -1,2 +1,7 @@
+# This file is automatically generated by OpenAPI Generator (https://github.com/openAPITools/openapi-generator).
+# To include other gradle properties as part of the code generation process, please use the `gradleProperties` option.
+#
+# Gradle properties reference: https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+#
 android.useAndroidX=true
 android.enableJetifier=true