Command Line Activation: Since Android launches applications via Zygote and doesn't support direct POSIX argument injection , I enabled #enable-command-line-on-non-rooted-devices via chrome://flags.
Flag File Configuration: I configured the /data/local/tmp/chrome-command-line file. To prevent the POSIX-style parser from discarding the flag as the executable name, I prefixed the string with a placeholder token: chrome --csd-model-override=/sdcard/Android/data/org.chromium.chrome/files/csd_override
Model Storage Topology: To avoid SELinux AVC denials where the untrusted_app domain is restricted from reading shell_data_file contexts in /data/local/tmp/ , I pushed the models to the application-specific external storage container: /sdcard/Android/data/org.chromium.chrome/files/csd_override/. Both the Flatbuffer configuration (client_model.pb) and the visual model (pp3dc_vis_ep16_meta_int8_224only.tflite) are placed there , inheriting the correct external_files / app_data_file contexts for the browser process to read natively.