Don't block long time gettng system service

Test: run google/template/local --template:map test
      google/continuous/boot-successive --no-first-boot --successive-boot
      --boot-count 10 --granular-boot-info -f
      SystemServerTiming_StartServices,SystemServerTiming_StartAudioService

bug:72322854

Change-Id: Ie287e0a8f1ed10f9a535b489cef6f3db184e41cb
diff --git a/libs/binder/ActivityManager.cpp b/libs/binder/ActivityManager.cpp
index 7724bf1..e1cc5da 100644
--- a/libs/binder/ActivityManager.cpp
+++ b/libs/binder/ActivityManager.cpp
@@ -15,6 +15,8 @@
  */
 
 #include <mutex>
+#include <unistd.h>
+
 #include <binder/ActivityManager.h>
 #include <binder/Binder.h>
 #include <binder/IServiceManager.h>
@@ -44,7 +46,7 @@
                 service = NULL;
                 break;
             }
-            sleep(1);
+            usleep(25000);
         } else {
             service = interface_cast<IActivityManager>(binder);
             mService = service;