Update lsdump files after ACgroupController_getFlags removal

Since ACgroupController_getFlags was introduced after LLNDK freeze it
causes media crashes due to missing symbol. Remove the new function and
re-implement cgroup controller detection to not require flags field but
instead check for its existence on the first access.

Bug: 135049992
Test: libcutils_test with and without CONFIG_CPUSETS enabled
Change-Id: I8e8ed76dc446f42ad56fb4b52243d3a663b9879e
Signed-off-by: Suren Baghdasaryan <surenb@google.com>