Generate prebuilt_systemserverclasspath_fragment.

Bug: 194150908
Test: m nothing
Test: manual - 1. Patch aosp/1835087.
  2. m out/soong/.intermediates/art/build/sdk/art-module-sdk/common_os/snapshot/Android.bp
  3. See prebuilt_systemserverclasspath_fragment modules and
     systemserverclasspath_fragments in an sdk_snapshot module.
Change-Id: I7876b077b0b4ed190f01dbfa9533de04ea32d524
diff --git a/sdk/Android.bp b/sdk/Android.bp
index c6544d6..acb9dbb 100644
--- a/sdk/Android.bp
+++ b/sdk/Android.bp
@@ -11,6 +11,7 @@
         "soong-android",
         "soong-apex",
         "soong-cc",
+        "soong-dexpreopt",
         "soong-java",
     ],
     srcs: [
@@ -31,6 +32,7 @@
         "license_sdk_test.go",
         "member_trait_test.go",
         "sdk_test.go",
+        "systemserverclasspath_fragment_sdk_test.go",
         "testing.go",
     ],
     pluginFor: ["soong_build"],