fix typo in documentation

Change-Id: I2c55034c25edd466180cd9c5718c2ad568aeedff
diff --git a/include/hardware/hwcomposer.h b/include/hardware/hwcomposer.h
index 827cea1..61ee736 100644
--- a/include/hardware/hwcomposer.h
+++ b/include/hardware/hwcomposer.h
@@ -328,7 +328,7 @@
      * vsync() is GUARANTEED TO NOT CALL BACK into the h/w composer HAL.
      *
      * It is expected that vsync() is called from a thread of at least
-     * ANDROID_URGENT_DISPLAY_PRIORITY with as little latency as possible,
+     * HAL_PRIORITY_URGENT_DISPLAY with as little latency as possible,
      * typically less than 0.5 ms.
      *
      * It is a (silent) error to have HWC_EVENT_VSYNC enabled when calling