Settings: Disable failing test

Disable temporarily.

Bug: 73892683
Test: m RunSettingsRoboTests
Change-Id: I8dcc30b0b090fef1f2fd8fa3c6de7bf69e8b97a9

tests/robotests/src/com/android/settings/applications/PictureInPictureSettingsTest.java

@@ -103,6 +103,7 @@ public class PictureInPictureSettingsTest {
         assertThat(containsPackages(apps, primaryP2, profileP1)).isFalse();
     }
 
+    @Ignore("b/73892683")
     @Test
     public void testAppSort() {
         PackageInfo primaryP1 = createPackage("Android", true);