Update torch brightness max level description.

Bug: 239492786
Change-Id: I9514a3d137a64f99e3c5c03d1843b53ace0cbf3a
diff --git a/core/java/android/hardware/camera2/CameraCharacteristics.java b/core/java/android/hardware/camera2/CameraCharacteristics.java
index 8db298f..861a850 100644
--- a/core/java/android/hardware/camera2/CameraCharacteristics.java
+++ b/core/java/android/hardware/camera2/CameraCharacteristics.java
@@ -1325,8 +1325,11 @@
      * flashlight brightness level via
      * {@link android.hardware.camera2.CameraManager#turnOnTorchWithStrengthLevel }.
      * If this value is equal to 1, flashlight brightness control is not supported.
-     * The value for this key will be null for devices with no flash unit.
-     * This level must be set to a safe value to prevent any burn out issues.</p>
+     * The value for this key will be null for devices with no flash unit.</p>
+     * <p>The maximum value is guaranteed to be safe to use for an indefinite duration in
+     * terms of device flashlight lifespan, but may be too bright for comfort for many
+     * use cases. Use the default torch brightness value to avoid problems with an
+     * over-bright flashlight.</p>
      * <p><b>Optional</b> - The value for this key may be {@code null} on some devices.</p>
      */
     @PublicKey