Add Gservices flag for Vending doctor download complete timeout.

core/java/android/provider/Settings.java

@@ -3190,6 +3190,13 @@ public final class Settings {
         public static final String VENDING_PENDING_DOWNLOAD_RESEND_FREQUENCY_MS =
                 "vending_pd_resend_frequency_ms";
 
+        /**
+         * Time before an asset in the 'DOWNLOADING' state is considered ready
+         * for an install kick on the client.
+         */
+        public static final String VENDING_DOWNLOADING_KICK_TIMEOUT_MS =
+                "vending_downloading_kick_ms";
+
         /**
          * Size of buffer in bytes for Vending to use when reading cache files.
          */