Set JAVA_HOME for runtime via soong AndroidTest.xml template

The jdk used by Robolectric during tests should always be the ANDROID_JAVA_HOME, as such this change, reads that environment variable from the build, and uses it to set the java_folder via the {EXTRA_CONFIGS} in the build/core/robolectric_test_config_template.xml

Test: atest MyRoboTests and look at the generated xml file
Bug: 372520027

Change-Id: I158eef8d52bef55167f207131139114db9a36691
diff --git a/java/robolectric.go b/java/robolectric.go
index ff0c850..507a310 100644
--- a/java/robolectric.go
+++ b/java/robolectric.go
@@ -144,20 +144,25 @@
 	r.forceOSType = ctx.Config().BuildOS
 	r.forceArchType = ctx.Config().BuildArch
 
-	var options []tradefed.Option
-	options = append(options, tradefed.Option{Name: "java-flags", Value: "-Drobolectric=true"})
+	var extraTestRunnerOptions []tradefed.Option
+	extraTestRunnerOptions = append(extraTestRunnerOptions, tradefed.Option{Name: "java-flags", Value: "-Drobolectric=true"})
 	if proptools.BoolDefault(r.robolectricProperties.Strict_mode, true) {
-		options = append(options, tradefed.Option{Name: "java-flags", Value: "-Drobolectric.strict.mode=true"})
+		extraTestRunnerOptions = append(extraTestRunnerOptions, tradefed.Option{Name: "java-flags", Value: "-Drobolectric.strict.mode=true"})
 	}
 
+	var extraOptions []tradefed.Option
+	var javaHome = ctx.Config().Getenv("ANDROID_JAVA_HOME")
+	extraOptions = append(extraOptions, tradefed.Option{Name: "java-folder", Value: javaHome})
+
 	r.testConfig = tradefed.AutoGenTestConfig(ctx, tradefed.AutoGenTestConfigOptions{
-		TestConfigProp:         r.testProperties.Test_config,
-		TestConfigTemplateProp: r.testProperties.Test_config_template,
-		TestSuites:             r.testProperties.Test_suites,
-		TestRunnerOptions:      options,
-		AutoGenConfig:          r.testProperties.Auto_gen_config,
-		DeviceTemplate:         "${RobolectricTestConfigTemplate}",
-		HostTemplate:           "${RobolectricTestConfigTemplate}",
+		TestConfigProp:          r.testProperties.Test_config,
+		TestConfigTemplateProp:  r.testProperties.Test_config_template,
+		TestSuites:              r.testProperties.Test_suites,
+		OptionsForAutogenerated: extraOptions,
+		TestRunnerOptions:       extraTestRunnerOptions,
+		AutoGenConfig:           r.testProperties.Auto_gen_config,
+		DeviceTemplate:          "${RobolectricTestConfigTemplate}",
+		HostTemplate:            "${RobolectricTestConfigTemplate}",
 	})
 	r.data = android.PathsForModuleSrc(ctx, r.testProperties.Data)
 	r.data = append(r.data, android.PathsForModuleSrc(ctx, r.testProperties.Device_common_data)...)