Don't test for backports in master android.jar

Change-Id: I7fcfc767962f4ba2a7703cd6969c0ae59092e6b4
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 195dfd2..1ca4309 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
@@ -79,6 +79,9 @@
   @Test
   public void testBackportedMethodsPerAPILevel() throws Exception {
     for (AndroidApiLevel apiLevel : AndroidApiLevel.values()) {
+      if (apiLevel == AndroidApiLevel.MASTER) {
+        continue;
+      }
       if (apiLevel == AndroidApiLevel.T) {
         continue;
       }