egl/android: do not indent HAVE_DRM_GRALLOC preprocessor directive

Fixes: 3f7bca44 ("egl/android: #ifdef out flink name support")
Fixes: c7bb8213 ("egl/android: Add DRM node probing and filtering")
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
(cherry picked from commit ac0856ae)