Remove ServiceManager usage from IpSecTransform

Remove ServiceManager hidden API dependency because this class
is going to be moved into mainline module. Thus have IpSecTransform
calls createTransform and deleteTransform through IpSecManager to
remove the ServiceManager usage.

Bug: 204153604
Test: FrameworksNetTests
Change-Id: Iba48da4aecac1080684d5a7e7e7ca2e31219591a

framework-t/src/android/net/IpSecManager.java

@@ -27,6 +27,7 @@ import android.content.Context;
 import android.content.pm.PackageManager;
 import android.net.annotations.PolicyDirection;
 import android.os.Binder;
+import android.os.IBinder;
 import android.os.ParcelFileDescriptor;
 import android.os.RemoteException;
 import android.os.ServiceSpecificException;
@@ -980,6 +981,29 @@ public final class IpSecManager {
         }
     }
 
+    /**
+     * @hide
+     */
+    public IpSecTransformResponse createTransform(IpSecConfig config, IBinder binder,
+            String callingPackage) {
+        try {
+            return mService.createTransform(config, binder, callingPackage);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * @hide
+     */
+    public void deleteTransform(int resourceId) {
+        try {
+            mService.deleteTransform(resourceId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
     /**
      * Construct an instance of IpSecManager within an application context.
      *