Use embedded native libs for NetworkStack.apk.

So that the /system version of NetworkStack.apk can be re-installed on
/data without causing problems. This is useful for testing and necessary
for supporting rollback to the system version of NetworkStack.apk.

Bug: 131703417
Bug: 132195177
Test: Confirm NetworkStack.apk now includes .so files.
Test: adb install --staged NetworkStack.apk
      adb reboot
      Device reboots without problems.

Change-Id: I7c9a1702a2c18e0333b5e409f04b7658fe685f97

packages/NetworkStack/Android.bp

@@ -116,6 +116,7 @@ android_app {
     defaults: ["NetworkStackAppCommon"],
     certificate: "networkstack",
     manifest: "AndroidManifest.xml",
+    use_embedded_native_libs: true,
 }
 
 genrule {

packages/NetworkStack/AndroidManifest.xml

@@ -41,7 +41,7 @@
     <uses-permission android:name="android.permission.READ_DEVICE_CONFIG" />
     <!-- Signature permission defined in NetworkStackStub -->
     <uses-permission android:name="android.permission.MAINLINE_NETWORK_STACK" />
-    <application>
+    <application android:extractNativeLibs="false">
         <service android:name="com.android.server.NetworkStackService">
             <intent-filter>
                 <action android:name="android.net.INetworkStackConnector"/>