Ignore flaky test

Bug: 149046729
Test: atest NotificationRankingManagerTest
Change-Id: I76049c050cc760faf773ca15cb1a90700b031231

packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/collection/NotificationRankingManagerTest.kt

@@ -40,6 +40,7 @@ import com.android.systemui.statusbar.policy.HeadsUpManager
 import dagger.Lazy
 import junit.framework.Assert.assertEquals
 import org.junit.Before
+import org.junit.Ignore
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mockito.mock
@@ -195,6 +196,7 @@ class NotificationRankingManagerTest : SysuiTestCase() {
         assertEquals(listOf(b, a), rankingManager.updateRanking(null, listOf(a, b), "test"))
     }
 
+    @Ignore // TODO: (b/149046729) fix test and re-enable
     @Test
     fun testSort_importantPeople() {
         whenever(sectionsManager.isFilteringEnabled()).thenReturn(true)