Load non-locale .pak files directly from the .apk on Android (rather than extracting on start-up).

build/config/android/rules.gni

Index: build/config/android/rules.gni
diff --git a/build/config/android/rules.gni b/build/config/android/rules.gni
index 96cbe44f1ca6d5a8ddd2d78217e4f6ab2360c15b..e6e12f00811552efcfc48189c39d6467ebf800c3 100644
--- a/build/config/android/rules.gni
+++ b/build/config/android/rules.gni
@@ -1669,8 +1669,10 @@ template("android_apk") {
     if (defined(invoker.extensions_to_not_compress)) {
       extensions_to_not_compress = invoker.extensions_to_not_compress
     } else {
-      # Allow icu data and v8 snapshots to be loaded directly from the .apk.
-      extensions_to_not_compress = "dat,bin"
+      # Allow icu data, v8 snapshots, and pak files to be loaded directly from
+      # the .apk.
+      # Note: These are actually suffix matches, not necessarily extensions.
+      extensions_to_not_compress = ".dat,.bin,.pak"
     }
 
     version_code = _version_code