Add pulled atoms support for native clients in stats-log-api-gen

Similar to adding pulled atoms support for Java clients, now also
add pulled atoms support for native clients.

Bug: 160367907
Test: Ran `m` and completed successfully
Test: Ran `atest statsd_test` and all CTS tests passed
Test: Ran `atest HostAtomTests` and all CTS tests passed
Test: Ran `atest stats-log-api-gen-test` and all CTS tests passed
Change-Id: I57911864cc3fc5569322333a934dfc10aa78ddca