gn2bp: fix arguments for jni_generator.py am: 8acccca497

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2276594

Change-Id: Icb6a600463fc82c15c13ecfa510d33cbfd9fcd41
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>