[Chromecast] Set the cast_product_type to the correct value on Android.

chromecast/base/BUILD.gn

Index: chromecast/base/BUILD.gn
diff --git a/chromecast/base/BUILD.gn b/chromecast/base/BUILD.gn
index b807ad8ed494df7e0cf340779ee659b51a2579f4..b22ffc3c7effc0a35decf196f0f267688fd185c2 100644
--- a/chromecast/base/BUILD.gn
+++ b/chromecast/base/BUILD.gn
@@ -13,10 +13,18 @@ if (is_android) {
 declare_args() {
   # Denotes the type of Cast product. This is #defined as CAST_PRODUCT_TYPE in
   # version.h. This is an integer in the range [0-4].
-  cast_product_type = 0
+  if (is_android) {
+    cast_product_type = 4
+  } else {
+    cast_product_type = 0
+  }
 }
 
-assert(cast_product_type >= 0 && cast_product_type <= 4)
+if (is_android) {
+  assert(cast_product_type == 4)
+} else {
+  assert(cast_product_type >= 0 && cast_product_type <= 3)
+}
 
 # GYP target: chromecast.gyp:cast_base
 source_set("base") {