Add cld2_table_size variable to GN build.

build/config/features.gni

Index: build/config/features.gni
diff --git a/build/config/features.gni b/build/config/features.gni
index f6469e234edb5aeb46ffd0d60dcdc8b4495e2a25..a32d8112c2ce5c46b8f4f7315f47efff278c810b 100644
--- a/build/config/features.gni
+++ b/build/config/features.gni
@@ -129,6 +129,12 @@ declare_args() {
 #   2: Use only CLD2.
 cld_version = 2
 
+if (is_android || is_ios) {
+  cld2_table_size = 0  # Small, accurate tables
+} else {
+  cld2_table_size = 2  # Larger, more accurate tables
+}
+
 # libudev usage. This currently only affects the content layer.
 use_udev = is_linux