Expose TestAPIs needed by GtsOsTestCases

Test: atest GtsOsTestCases on pi-dev:taimen and oc-mr1:sailfish
Bug: 77497338
Change-Id: I5de976991a857bfbed2faa943822af542601fa8b

location/java/android/location/LocationManager.java

@@ -29,6 +29,7 @@ import android.annotation.RequiresPermission;
 import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
+import android.annotation.TestApi;
 import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
@@ -391,6 +392,18 @@ public class LocationManager {
         }
     }
 
+    /**
+     * @hide
+     */
+    @TestApi
+    public String[] getBackgroundThrottlingWhitelist() {
+        try {
+            return mService.getBackgroundThrottlingWhitelist();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
     /**
      * @hide - hide this constructor because it has a parameter
      * of type ILocationManager, which is a system private class. The