Deprecate screen brightness boost detection.

Deprecated:
PowerManager#isScreenBrightnessBoosted
ACTION_SCREEN_BRIGHTNESS_BOOST_CHANGED

Bug: 62348163
Test: isScreenBrightnessBoosted should return false.
Change-Id: Ia580daeffb249110a6adf1e46052966a718226cb
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 958592b..9455d92 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -94,6 +94,7 @@
     <protected-broadcast android:name="android.os.action.POWER_SAVE_TEMP_WHITELIST_CHANGED" />
     <protected-broadcast android:name="android.os.action.POWER_SAVE_MODE_CHANGED_INTERNAL" />
 
+    <!-- @deprecated This is rarely used and will be phased out soon. -->
     <protected-broadcast android:name="android.os.action.SCREEN_BRIGHTNESS_BOOST_CHANGED" />
 
     <protected-broadcast android:name="android.app.action.ENTER_CAR_MODE" />