Move VPN JNI to the bottom of srcs

This is a no-op change in preparation of a bigger topic to create the
tethering+connectivity APEXes. This change allows the topic to avoid
merge conflicts between branches.

Bug: 171540887
Test: m
Change-Id: I3ab497f2133c9020131ca4392f34aedb8da99cc9

services/core/jni/Android.bp

@@ -26,7 +26,6 @@ cc_library_static {
         "com_android_server_adb_AdbDebuggingManager.cpp",
         "com_android_server_am_BatteryStatsService.cpp",
         "com_android_server_biometrics_SurfaceToNativeHandleConverter.cpp",
-        "com_android_server_connectivity_Vpn.cpp",
         "com_android_server_ConsumerIrService.cpp",
         "com_android_server_devicepolicy_CryptoTestHelper.cpp",
         "com_android_server_gpu_GpuService.cpp",
@@ -62,6 +61,8 @@ cc_library_static {
         "com_android_server_pm_PackageManagerShellCommandDataLoader.cpp",
         "onload.cpp",
         ":lib_networkStatsFactory_native",
+        // TODO: move the file below to the connectivity APEX
+        "com_android_server_connectivity_Vpn.cpp",
     ],
 
     include_dirs: [