message: [firewall] enable firewall for otbr-agent by default
diff: @@ -33,6 +33,7 @@ set(OT_BUILD_EXECUTABLES OFF CACHE BOOL "disable building executables" FORCE)
  set(OT_BUILTIN_MBEDTLS_MANAGEMENT OFF CACHE BOOL "diable mbedTLS management" FORCE)
  set(OT_COMMISSIONER ON CACHE BOOL "enable commissioner" FORCE)
  set(OT_DAEMON ON CACHE BOOL "enable daemon mode" FORCE)
  +set(OT_FIREWALL ON CACHE BOOL "enable firewall feature" FORCE)
  set(OT_JOINER ON CACHE BOOL "enable joiner" FORCE)
  set(OT_LEGACY ON CACHE STRING "enable legacy network support" FORCE)
  if (NOT OT_THREAD_VERSION EQUAL "1.1")
  