make the warning timout of Fence::waitForever() implicit and longer

- timeout is now 3 seconds instead of 1
- simplifies the API a bit
- allows us to change/tweak this timeout globaly

Bug: 8988871

Change-Id: I8d3c6ec43a372f602fb3f29856710339f86c0ec9
diff --git a/include/ui/Fence.h b/include/ui/Fence.h
index 81d5d09..60156e7 100644
--- a/include/ui/Fence.h
+++ b/include/ui/Fence.h
@@ -70,9 +70,10 @@
     // waitForever is a convenience function for waiting forever for a fence to
     // signal (just like wait(TIMEOUT_NEVER)), but issuing an error to the
     // system log and fence state to the kernel log if the wait lasts longer
-    // than warningTimeout. The logname argument should be a string identifying
+    // than a warning timeout.
+    // The logname argument should be a string identifying
     // the caller and will be included in the log message.
-    status_t waitForever(unsigned int warningTimeout, const char* logname);
+    status_t waitForever(const char* logname);
 
     // merge combines two Fence objects, creating a new Fence object that
     // becomes signaled when both f1 and f2 are signaled (even if f1 or f2 is