ANDROID: cuttlefish: enable CONFIG_NET_SCH_NETEM=y

This is to mirror:
  https://android-review.googlesource.com/c/kernel/configs/+/906713


  android-4.9+: add CONFIG_NET_SCH_NETEM=y to recommended config

Generated via:
  echo 'CONFIG_NET_SCH_NETEM=y' >> arch/x86/configs/x86_64_cuttlefish_defconfig
  echo 'CONFIG_NET_SCH_NETEM=y' >> arch/arm64/configs/cuttlefish_defconfig
  make ARCH=x86_64 x86_64_cuttlefish_defconfig
  make ARCH=x86_64 savedefconfig
  cat defconfig > arch/x86/configs/x86_64_cuttlefish_defconfig
  make ARCH=arm64 cuttlefish_defconfig
  make ARCH=arm64 savedefconfig
  cat defconfig > arch/arm64/configs/cuttlefish_defconfig
  rm defconfig

Bug: 124467469
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I397022f591f03521c02ab46d7a02ea256f74bc9b