ANDROID: android-base.cfg: remove defunct options

INET6_DIAG_DESTROY and NETFILTER_TPROXY are not used anymore
so they should not be part of the base Android kernel configuration.

Bug: 37749708
Change-Id: I59d0bf7d33a3b46e1f67f93f0b8e49eebbfce89c
Signed-off-by: Steve Muckle <smuckle@google.com>