Reduce WRAPPED_PID_TIMEOUT_MILLIS to 20s.

It will allow us to reduce the system server watchdog to 20s.

Test: manual
Bug: 209932320
Change-Id: Ifea5529cea8344141cfd19b53c3b3723d51134dc

core/java/com/android/internal/os/ZygoteConnectionConstants.java

@@ -41,5 +41,5 @@ public class ZygoteConnectionConstants {
      * WARNING: This may trigger the watchdog in debug mode. However, to support
      *          wrapping on lower-end devices we do not have much choice.
      */
-    public static final int WRAPPED_PID_TIMEOUT_MILLIS = 30000;
+    public static final int WRAPPED_PID_TIMEOUT_MILLIS = 20000;
 }