Add the new xml config values for content protection service

Bug: 275732576
Test: Manual testing
Change-Id: I6f8269b9a8e1f8a40685097277d75b074ae32441

core/res/res/values/config.xml

@@ -4429,6 +4429,14 @@
     -->
     <string name="config_defaultContentCaptureService" translatable="false"></string>
 
+    <!-- The package name for the system's content protection service.
+         This service must be trusted, as it can be activated without explicit consent of the user.
+         If no service with the specified name exists on the device, content protection will be
+         disabled.
+         Example: "com.android.contentprotection/.ContentProtectionService"
+    -->
+    <string name="config_defaultContentProtectionService" translatable="false"></string>
+
     <!-- The package name for the system's augmented autofill service.
          This service must be trusted, as it can be activated without explicit consent of the user.
          If no service with the specified name exists on the device, augmented autofill wil be

core/res/res/values/symbols.xml

@@ -3761,6 +3761,7 @@
   <java-symbol type="string" name="config_defaultTextClassifierPackage" />
   <java-symbol type="string" name="config_defaultWellbeingPackage" />
   <java-symbol type="string" name="config_defaultContentCaptureService" />
+  <java-symbol type="string" name="config_defaultContentProtectionService" />
   <java-symbol type="string" name="config_defaultAugmentedAutofillService" />
   <java-symbol type="string" name="config_defaultTranslationService" />
   <java-symbol type="string" name="config_defaultAppPredictionService" />

services/java/com/android/server/SystemServer.java

@@ -3255,6 +3255,12 @@ public final class SystemServer implements Dumpable {
                 Slog.d(TAG, "ContentCaptureService disabled because resource is not overlaid");
                 return;
             }
+            if (!deviceHasConfigString(context, R.string.config_defaultContentProtectionService)) {
+                Slog.d(
+                        TAG,
+                        "ContentProtectionService disabled because resource is not overlaid,"
+                            + " ContentCaptureService still enabled");
+            }
         }
 
         t.traceBegin("StartContentCaptureService");