Camera: Update LowLightBoost Documentation

Low light boost state capture result is expected
to be always present.

Test: Successful build
Bug: 346182281
Change-Id: Iab7d7f05a9263f1cf094532d6cb5bbd070f021d9
diff --git a/core/java/android/hardware/camera2/CameraMetadata.java b/core/java/android/hardware/camera2/CameraMetadata.java
index de26384..4819f67 100644
--- a/core/java/android/hardware/camera2/CameraMetadata.java
+++ b/core/java/android/hardware/camera2/CameraMetadata.java
@@ -2360,11 +2360,8 @@
      * <p>If the session configuration is not supported, the AE mode reported in the
      * CaptureResult will be 'ON' instead of 'ON_LOW_LIGHT_BOOST_BRIGHTNESS_PRIORITY'.</p>
      * <p>When this AE mode is enabled, the CaptureResult field
-     * {@link CaptureResult#CONTROL_LOW_LIGHT_BOOST_STATE android.control.lowLightBoostState} will be present and not null. Otherwise, the
-     * {@link CaptureResult#CONTROL_LOW_LIGHT_BOOST_STATE android.control.lowLightBoostState} field will not be present in the CaptureResult.</p>
-     * <p>The application can observe the CaptureResult field
-     * {@link CaptureResult#CONTROL_LOW_LIGHT_BOOST_STATE android.control.lowLightBoostState} to determine when low light boost is 'ACTIVE' or
-     * 'INACTIVE'.</p>
+     * {@link CaptureResult#CONTROL_LOW_LIGHT_BOOST_STATE android.control.lowLightBoostState} will indicate when low light boost is 'ACTIVE'
+     * or 'INACTIVE'. By default {@link CaptureResult#CONTROL_LOW_LIGHT_BOOST_STATE android.control.lowLightBoostState} will be 'INACTIVE'.</p>
      * <p>The low light boost is 'ACTIVE' once the scene lighting condition is less than the
      * upper bound lux value defined by {@link CameraCharacteristics#CONTROL_LOW_LIGHT_BOOST_INFO_LUMINANCE_RANGE android.control.lowLightBoostInfoLuminanceRange}.
      * This mode will be 'INACTIVE' once the scene lighting condition is greater than the
diff --git a/core/java/android/hardware/camera2/CaptureResult.java b/core/java/android/hardware/camera2/CaptureResult.java
index 4406a41..d3d11f0 100644
--- a/core/java/android/hardware/camera2/CaptureResult.java
+++ b/core/java/android/hardware/camera2/CaptureResult.java
@@ -2819,12 +2819,11 @@
      * <p>When low light boost is enabled by setting the AE mode to
      * 'ON_LOW_LIGHT_BOOST_BRIGHTNESS_PRIORITY', it can dynamically apply a low light
      * boost when the light level threshold is exceeded.</p>
-     * <p>This field is present in the CaptureResult when the AE mode is set to
-     * 'ON_LOW_LIGHT_BOOST_BRIGHTNESS_PRIORITY'. Otherwise, the field is not present.</p>
      * <p>This state indicates when low light boost is 'ACTIVE' and applied. Similarly, it can
      * indicate when it is not being applied by returning 'INACTIVE'.</p>
      * <p>This key will be absent from the CaptureResult if AE mode is not set to
      * 'ON_LOW_LIGHT_BOOST_BRIGHTNESS_PRIORITY.</p>
+     * <p>The default value will always be 'INACTIVE'.</p>
      * <p><b>Possible values:</b></p>
      * <ul>
      *   <li>{@link #CONTROL_LOW_LIGHT_BOOST_STATE_INACTIVE INACTIVE}</li>