gn2bp: Add required libs to `JniGenerator`

* I do not expect this to change in the nearby future hence it can be hardcoded. However, I'm not satisfied and might think of introducing some design change later once we get this to build.

Test: update_results && m cronet_aml_components_cronet_android_cronet
Change-Id: Ie24c622323e8994fdd0b7fc3a2a62bcbadb50067
2 files changed