Add method to get key value type ids

BPF_ANNOTATE_KV_PAIR is used to tell the bpf loader about the btf
key_type and value_type of a bpf map.
This CL adds a method to get key value type ids from
BPF_ANNOTATE_KV_PAIR

Bug: 403381101
Test: boot
Change-Id: If308d49b64b38f65991a0a8177e5072d54e2cdf6
1 file changed