Revert "Increase timeout for the 570-checker-osr test from 20s to 60s."

The timeout was an actual test failure, fixed by
    https://android-review.googlesource.com/217041

Bug: 28210356

This reverts commit d676227d8fcef3c3d34f1a7a44141b4f5f2e8519.

Change-Id: If69e09f3650f87cd4e6e22bb28a7b807be3094e1
diff --git a/test/570-checker-osr/src/Main.java b/test/570-checker-osr/src/Main.java
index ba839bf..f22a0c1 100644
--- a/test/570-checker-osr/src/Main.java
+++ b/test/570-checker-osr/src/Main.java
@@ -24,7 +24,7 @@
     };
     testThread.start();
     try {
-      testThread.join(60 * 1000);  // 60s timeout.
+      testThread.join(20 * 1000);  // 20s timeout.
     } catch (InterruptedException ie) {
       System.out.println("Interrupted.");
       System.exit(1);