Implemented UserHalService.getInitialUserInfo().

Test: atest CarServiceUnitTest:com.android.car.hal.UserHalServiceTest

Bug: 146207078
Bug: 149099817

Change-Id: Ic6ccab64bcfb48d73327568d4a0d7b819e86e98c
diff --git a/service/src/com/android/car/ICarImpl.java b/service/src/com/android/car/ICarImpl.java
index 40f863a..e5e1e1a 100644
--- a/service/src/com/android/car/ICarImpl.java
+++ b/service/src/com/android/car/ICarImpl.java
@@ -745,6 +745,8 @@
         private static final String COMMAND_DISABLE_FEATURE = "disable-feature";
         private static final String COMMAND_INJECT_KEY = "inject-key";
 
+        // TODO(b/146207078): add a "get-initial-user-info" command
+
         private static final String PARAM_DAY_MODE = "day";
         private static final String PARAM_NIGHT_MODE = "night";
         private static final String PARAM_SENSOR_MODE = "sensor";