Camera3: Document missing AF transitions.

Bug: 9075581

Change-Id: I7688cee904987f404b4ab7ff0e5212182f85a271
diff --git a/include/hardware/camera3.h b/include/hardware/camera3.h
index af91856..3a900fc 100644
--- a/include/hardware/camera3.h
+++ b/include/hardware/camera3.h
@@ -723,6 +723,12 @@
  *| CONVERGED          | AE/AWB_LOCK   | LOCKED             | values locked    |
  *|                    | on            |                    |                  |
  *+--------------------+---------------+--------------------+------------------+
+ *| FLASH_REQUIRED     | HAL initiates | SEARCHING          | values locked    |
+ *|                    | AE/AWB scan   |                    |                  |
+ *+--------------------+---------------+--------------------+------------------+
+ *| FLASH_REQUIRED     | AE/AWB_LOCK   | LOCKED             | values locked    |
+ *|                    | on            |                    |                  |
+ *+--------------------+---------------+--------------------+------------------+
  *| LOCKED             | AE/AWB_LOCK   | SEARCHING          | values not good  |
  *|                    | off           |                    | after unlock     |
  *+--------------------+---------------+--------------------+------------------+