[NETD-BPF#10] Add WaitForProgsLoaded.h am: 5b0fbc192e am: 0f9e8af368 am: 2e70f46b48

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1869328

Change-Id: Ie18a7a9bdb12830a9559e57ed863bbb035fa3acc