Replace testWidevine23FpsH264Fixed with a shorter test.

Select WidevineYouTubePerformanceTests#testL3Cenc480P30
so the test does not exceed one minute during presubmit
testing.

Requires adding @Presubmit annotation to testL3Cenc480P30.
This is because some existing tests that use @Presubmit
annotation take precedent over the rest of the tests in
TEST_MAPPING file. If we do not use @Presubmit annotation,
the new test will not be executed. Using @Presubmit annotation
has the advantage of not having to explicitly specify
testL3Cenc480P30 in the include-filter.

Test: atest --test-mapping [directory with TEST_MAPPING]
  e.g. from frameworks/av, run "atest --test-mapping drm

Bug: 168159824
Change-Id: I283ed9b1fe7f5554c4ae6c63458a954f2c7b51e1
diff --git a/drm/TEST_MAPPING b/drm/TEST_MAPPING
index 2595e3e..9f6a532 100644
--- a/drm/TEST_MAPPING
+++ b/drm/TEST_MAPPING
@@ -9,17 +9,9 @@
         },
         {
           "include-filter": "com.google.android.media.gts.WidevineGenericOpsTests"
-        }
-      ]
-    },
-    {
-      "name": "GtsExoPlayerTestCases",
-      "options" : [
-        {
-          "include-annotation": "android.platform.test.annotations.SocPresubmit"
         },
         {
-          "include-filter": "com.google.android.exoplayer.gts.DashTest#testWidevine23FpsH264Fixed"
+          "include-filter": "com.google.android.media.gts.WidevineYouTubePerformanceTests"
         }
       ]
     }