Revert "Introduce a new sdk_sandbox domain"

This reverts commit 304962477a0c7de51a21368a87fe1cf94ce8cbab.

Reason for revert: b/279565840

Change-Id: I6fc3a102994157ea3da751364f80730f4d0e87f0
diff --git a/private/isolated_app_all.te b/private/isolated_app_all.te
index 0617a57..200af1b 100644
--- a/private/isolated_app_all.te
+++ b/private/isolated_app_all.te
@@ -104,7 +104,7 @@
 # excluding unix_stream_socket and unix_dgram_socket.
 # Many of these are socket families which have never and will never
 # be compiled into the Android kernel.
-neverallow isolated_app_all { self ephemeral_app priv_app sdk_sandbox_all untrusted_app_all }:{
+neverallow isolated_app_all { self ephemeral_app priv_app sdk_sandbox untrusted_app_all }:{
   socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket
   key_socket appletalk_socket netlink_route_socket
   netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket