Add TEST_MAPPING for SystemUI notification files

 Runs CtsNotificationTestCases as pre/postsubmit.

Test: atest --test-mapping frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar:presubmit
Test: atest --test-mapping frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar:postsubmit
Bug: 294034943
Change-Id: I5d3e935ea5623c643c4f6774e4025a7292183f15

packages/SystemUI/src/com/android/systemui/statusbar/TEST_MAPPING

+{
+  "presubmit": [
+    {
+      "name": "CtsNotificationTestCases",
+      "options": [
+        {
+          "exclude-annotation": "android.platform.test.annotations.FlakyTest"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.FlakyTest"
+        },
+        {
+          "exclude-annotation": "org.junit.Ignore"
+        },
+        {
+          "exclude-annotation": "android.platform.test.annotations.LargeTest"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.LargeTest"
+        }
+      ]
+    }
+  ],
+  "postsubmit": [
+    {
+      "name": "CtsNotificationTestCases"
+    }
+  ]
+}