Define cc_api_headers module

Define cc_api_headers module to import from API surfaces and replace
existing header definition if needed.

Tested with :
cc_api_headers {
  name: "libc_headers",
  export_system_include_dirs: [
    "include",
  ],
  min_sdk_version: "1",
  sdk_version: "1",
  vendor_available: true,
  native_bridge_supported: true,
  ...
}

Bug: 236087698
Test: ALLOW_MISSING_DEPENDENCIES=true m -j vendorimage succeeded
Change-Id: I2c3294fe19a272453a168d8c7beeee9859bd4583