Add CTS/GTS tests for TH presumbit.

Define CTS/GTS filters in TEST_MAPPING.

Test: time atest
bug: 138259722
Change-Id: Ib7f27dc5eb8699260cf6b79b03d45de6390aa6f7
diff --git a/drm/TEST_MAPPING b/drm/TEST_MAPPING
new file mode 100644
index 0000000..cff6819
--- /dev/null
+++ b/drm/TEST_MAPPING
@@ -0,0 +1,8 @@
+{
+  "imports": [
+    // gts and cts filters
+    {
+      "path": "frameworks/av/drm/libmediadrm"
+    }
+  ]
+}