Remove libnetdbpf_test from TEST_MAPPING am: 2f7e47837a am: e32ae03ccc am: b95bfb67a1

Original change: https://android-review.googlesource.com/c/platform/external/android-clat/+/1956086

Change-Id: Id1b14c0bdf2be0d0a47f0b1cd47230f2c1bc7f96