android.mk: Add missing variables to the make target

android.mk: Add missing variables to the make target

Android build system may use different internal variables to specify
cflags/cppflags.
Small change in product confguration may force Android to use diffrent
set of variables, therefore we should keep all of them attached to the
make rule's target.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5549
Fixes: 8621bd8d5e67 ("android: Add scripts to build using meson")
Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Acked-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Marijn Suijten <marijn.suijten@somainline.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13914>