docs: fixed typo

Test: make ds-docs

Bug: 36942287

Change-Id: I6931817127a7b98a4b97e0e18cf4d654231c32f9
Exempt-From-Owner-Approval: Docs-only change
diff --git a/core/java/android/os/Handler.java b/core/java/android/os/Handler.java
index f5bca04..2b5f3da 100644
--- a/core/java/android/os/Handler.java
+++ b/core/java/android/os/Handler.java
@@ -33,7 +33,7 @@
  * them as they come out of the message queue.
  * 
  * <p>There are two main uses for a Handler: (1) to schedule messages and
- * runnables to be executed as some point in the future; and (2) to enqueue
+ * runnables to be executed at some point in the future; and (2) to enqueue
  * an action to be performed on a different thread than your own.
  * 
  * <p>Scheduling messages is accomplished with the