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: Ibd9d6df61b8f637b4e4cb1810ae5b595dce717ad
diff --git a/media/TEST_MAPPING b/media/TEST_MAPPING
index 6dc0c6f..cf2f0f0 100644
--- a/media/TEST_MAPPING
+++ b/media/TEST_MAPPING
@@ -4,21 +4,13 @@
       "name": "GtsMediaTestCases",
       "options" : [
         {
-	  "include-annotation": "android.platform.test.annotations.Presubmit"
+          "include-annotation": "android.platform.test.annotations.Presubmit"
         },
         {
           "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"
         }
       ]
     }