Adding mapFlags parameter while created BPF maps.

This will allow BPF maps to be created with flag options that are
supported e.g BPF_F_NO_PREALLOC, BPF_F_MMAPABLE and others.

Bug: 387984935
Test: Modified NetBpfLoader to dump the map flags.
Change-Id: Ia13ca5a861e8275e831c2b96f4759d1e8f111963
2 files changed