Add a new PRODUCT variable for forcing 'speed' preopt.

bug: 35872915
Test: build
Change-Id: Idfea3c379a2b1dab30ee94a58ffe86d508f8522f
diff --git a/core/product.mk b/core/product.mk
index 7742cc3..34cd21c 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -114,6 +114,7 @@
     PRODUCT_SYSTEM_PROPERTY_BLACKLIST \
     PRODUCT_SYSTEM_SERVER_APPS \
     PRODUCT_SYSTEM_SERVER_JARS \
+    PRODUCT_DEXPREOPT_SPEED_APPS \
     PRODUCT_VBOOT_SIGNING_KEY \
     PRODUCT_VBOOT_SIGNING_SUBKEY \
     PRODUCT_VERITY_SIGNING_KEY \