[frameworks][base][statsd] fix -Wreorder-init-list

C++20 would like members of designated initializers to be ordered, so
that initialization side effects match member initialization in explicit
constructors. This differs from C99.

Bug: 139945549
Test: mm
Change-Id: Iadc96f8f0bf57181970ca3e96b5c5f68ac40a030
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>