Update TestBackportedNotPresentInAndroidJar after adding U

Change-Id: I87bc85a7da817c96b324b14ba7c674c92f13d060
diff --git a/src/test/java/com/android/tools/r8/desugar/backports/TestBackportedNotPresentInAndroidJar.java b/src/test/java/com/android/tools/r8/desugar/backports/TestBackportedNotPresentInAndroidJar.java
index 1ca4309..1a744bb 100644
--- a/src/test/java/com/android/tools/r8/desugar/backports/TestBackportedNotPresentInAndroidJar.java
+++ b/src/test/java/com/android/tools/r8/desugar/backports/TestBackportedNotPresentInAndroidJar.java
@@ -82,6 +82,9 @@
       if (apiLevel == AndroidApiLevel.MASTER) {
         continue;
       }
+      if (apiLevel == AndroidApiLevel.U) {
+        continue;
+      }
       if (apiLevel == AndroidApiLevel.T) {
         continue;
       }