Dexpreopt standalone system server jars.

Standalone system server jars are dynamically loaded by system server
using a `PathClassLoader` whose parent is `SYSTEMSERVERCLASSPATH`. They
are listed in `PRODUCT_STANDALONE_SYSTEM_SERVER_JARS` and
`PRODUCT_APEX_STANDALONE_SYSTEM_SERVER_JARS` in Makefile. We need to
dexpreopt them to achieve better performance.

Bug: 203198541
Test: m nothing
Test: -
  1. Add a standalone system server jar (e.g., by patching
     aosp/1906158)
  2. Build a system image.
  3. See the odex and vdex files generated in
     $ANDROID_PRODUCT_OUT/system/framework/oat/
  4. Flash the image to a device.
  5. Run `atest art_standalone_dexpreopt_tests`.
Change-Id: I358a62d34989c5c8eba12e18fe6167e0b72ff69d
diff --git a/java/systemserver_classpath_fragment.go b/java/systemserver_classpath_fragment.go
index 2ec33a4..fa61ea6 100644
--- a/java/systemserver_classpath_fragment.go
+++ b/java/systemserver_classpath_fragment.go
@@ -60,7 +60,7 @@
 	classpathJars := configuredJarListToClasspathJars(ctx, configuredJars, p.classpathType)
 	standaloneConfiguredJars := p.standaloneConfiguredJars(ctx)
 	standaloneClasspathJars := configuredJarListToClasspathJars(ctx, standaloneConfiguredJars, STANDALONE_SYSTEMSERVER_JARS)
-	configuredJars = configuredJars.AppendList(standaloneConfiguredJars)
+	configuredJars = configuredJars.AppendList(&standaloneConfiguredJars)
 	classpathJars = append(classpathJars, standaloneClasspathJars...)
 	p.classpathFragmentBase().generateClasspathProtoBuildActions(ctx, configuredJars, classpathJars)
 }
@@ -122,7 +122,7 @@
 	classpathJars := configuredJarListToClasspathJars(ctx, configuredJars, s.classpathType)
 	standaloneConfiguredJars := s.standaloneConfiguredJars(ctx)
 	standaloneClasspathJars := configuredJarListToClasspathJars(ctx, standaloneConfiguredJars, STANDALONE_SYSTEMSERVER_JARS)
-	configuredJars = configuredJars.AppendList(standaloneConfiguredJars)
+	configuredJars = configuredJars.AppendList(&standaloneConfiguredJars)
 	classpathJars = append(classpathJars, standaloneClasspathJars...)
 	s.classpathFragmentBase().generateClasspathProtoBuildActions(ctx, configuredJars, classpathJars)