[android] Module load extraFiles (#55644)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/55644
Testing:
Prepare the model with extra:
```
extra_files = {}
extra_files["model/live.spec.json"] = '{ "spec": "spec_value"}'
torch.jit.save(script_model, "extra.pt", _extra_files=extra_files)
script_model._save_for_lite_interpreter("extra.ptl"), _extra_files=extra_files)
```
Change android/test_app/app/src/main/java/org/pytorch/testapp/MainActivity.java
1. Full jit
```
Map<String, String> map = new HashMap<>();
map.put("model/live.spec.json", "");
mModule = Module.load(assetFilePath(this, BuildConfig.MODULE_ASSET_NAME), map, Device.CPU);
android.util.Log.i("XXX", "map:" + map);
```
`gradle -p android test_app:installMnetLocalBaseDebug -PABI_FILTERS=arm64-v8a`
2. Lite
```
Map<String, String> map = new HashMap<>();
map.put("model/live.spec.json", "");
mModule = LiteModuleLoader.load(assetFilePath(this, BuildConfig.MODULE_ASSET_NAME), map, Device.CPU);
android.util.Log.i("XXX", "map:" + map);
```
`BUILD_LITE_INTERPRETER=1 gradle -p android test_app:installMnetLocalBaseDebug -PABI_FILTERS=arm64-v8a`
Check logcat
Test Plan: Imported from OSS
Reviewed By: ljk53
Differential Revision: D27663624
Pulled By: IvanKobzarev
fbshipit-source-id: 0dcd93b2fddaacd221db0306d18afee2584fcb85
