Limit GtsMediaTestCases presubmit to drm/crypto updates

Bug: 234785843
Test: atest frameworks/av/media
Change-Id: Id51ea384badbac30c6cd1fbfe557004910ac30aa
diff --git a/media/TEST_MAPPING b/media/TEST_MAPPING
index 3e79897..2793e76 100644
--- a/media/TEST_MAPPING
+++ b/media/TEST_MAPPING
@@ -15,7 +15,8 @@
                 {
                     "include-filter": "com.google.android.media.gts.WidevineH264PlaybackTests"
                 }
-            ]
+            ],
+            "file_patterns": ["(?i)drm|crypto"]
         }
     ],