Add a config for "wake screen on notifications".

This config value controls whether the "wake screen on notifications"
setting and functionality are available on a given device. By default
the value is "true", which means that there will be no change to any
current functionality.

Test: manually by checking that the "wake screen on notifications"
setting is still present in Settings, and the screen does wake up when a
notification arrives and this setting is enabled.
Bug: 231246919

Change-Id: I37f09fd3bcb820cbfa763bc8aa942924683cf9fb

core/java/android/hardware/display/AmbientDisplayConfiguration.java

@@ -89,7 +89,8 @@ public class AmbientDisplayConfiguration {
 
     /** @hide */
     public boolean pulseOnNotificationAvailable() {
-        return ambientDisplayAvailable();
+        return mContext.getResources().getBoolean(R.bool.config_pulseOnNotificationsAvailable)
+                && ambientDisplayAvailable();
     }
 
     /** @hide */

core/res/res/values/config.xml

@@ -5824,4 +5824,7 @@
     <string-array name="config_serviceStateLocationAllowedPackages">
         <item>"com.android.phone"</item>
     </string-array>
+
+    <!-- Whether the wake screen on notifications feature is available. -->
+    <bool name="config_pulseOnNotificationsAvailable">true</bool>
 </resources>

core/res/res/values/symbols.xml

@@ -3337,6 +3337,7 @@
   <java-symbol type="string" name="config_dozeTapSensorType" />
   <java-symbol type="array" name="config_dozeTapSensorPostureMapping" />
   <java-symbol type="bool" name="config_dozePulsePickup" />
+  <java-symbol type="bool" name="config_pulseOnNotificationsAvailable" />
 
   <!-- Used for MimeIconUtils. -->
   <java-symbol type="drawable" name="ic_doc_apk" />