Enable stagefright's http implementation by default.

related-to-bug: 2395398
diff --git a/target/product/core.mk b/target/product/core.mk
index 13190ac..a6a70df 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -30,4 +30,5 @@
 PRODUCT_PROPERTY_OVERRIDES += \
     media.stagefright.enable-player=true \
     media.stagefright.enable-meta=true   \
-    media.stagefright.enable-scan=true
+    media.stagefright.enable-scan=true   \
+    media.stagefright.enable-http=true