Add notification category: CATEGORY_NAVIGATION;

Add @SystemApi @hide notification categories: CATEGORY_CAR_EMERGENCY, CATEGORY_CAR_WARNING, and CATEGORY_CAR_INFORMATION.

Bug: 74546526
Test: runtest -x tests/app/src/android/app/cts/NotificationTest.java

Change-Id: Ib997992e039d2eddbd9c744816c35e279f9f9682