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/services/surfaceflinger/DisplayHardware/HWComposer.cpp b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
index f0f7463..a9afbe5 100644
--- a/services/surfaceflinger/DisplayHardware/HWComposer.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWComposer.cpp
@@ -750,7 +750,7 @@
     if (mHwc && hwcHasApiVersion(mHwc, HWC_DEVICE_API_VERSION_1_1)) {
         return setFramebufferTarget(id, acquireFence, buffer);
     } else {
-        acquireFence->waitForever(1000, "HWComposer::fbPost");
+        acquireFence->waitForever("HWComposer::fbPost");
         return mFbDev->post(mFbDev, buffer->handle);
     }
 }