bpfmap: Move to Common Location

Move bpfmap to frameworks/libs/net/common/native.

Bug: 179733303
Change-Id: Id08b216ec6a64968d66d7990f91ea7ce222a1154
diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index 60c1f2b..9eb98f1 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -80,6 +80,7 @@
         "libnativehelper_compat_libc++",
     ],
     static_libs: [
+        "libbpfmapjni",
         "libnetjniutils",
     ],