gn2bp Remove API helpers from cronet_aml_api_sources

Follow aosp/2388112
This CL does not add cronet_aml_api_helpers_sources module since it is
not used yet.
api helper sources will be added when they are used.

Test: ./update_results.sh, TH in aosp/2398772
Change-Id: I9f05aff302de9c24bc555f53e5e54d10f0d82057
2 files changed