tests: AppLaunch - increase sleep duration after resetting iorapd

Makes it less likely we'll launch the next app too quickly after
restarting iorapd.

Bug: 152322429
Test: am instrument
Change-Id: I4fc35665f03ae7d9fe073accfcb1e04842c737dd
diff --git a/tests/AppLaunch/src/com/android/tests/applaunch/AppLaunch.java b/tests/AppLaunch/src/com/android/tests/applaunch/AppLaunch.java
index 9be97b50..f444b77 100644
--- a/tests/AppLaunch/src/com/android/tests/applaunch/AppLaunch.java
+++ b/tests/AppLaunch/src/com/android/tests/applaunch/AppLaunch.java
@@ -767,7 +767,7 @@
                 .executeShellCommand(String.format("setprop iorapd.readahead.enable %b", enable));
         getInstrumentation().getUiAutomation()
                 .executeShellCommand("start iorapd");
-        sleep(2000);  // give enough time for iorapd to start back up.
+        sleep(3000);  // give enough time for iorapd to start back up.
 
         if (enable) {
             mIorapStatus = IorapStatus.ENABLED;