Add TEST_MAPPING for trust directories

These TEST_MAPPING files indicate presubmit should run atest on trust
specific tests when files are changed in these directories.

Test: local atest
Bug: 221155933
Change-Id: I4f94bba968a68c9c95da30390a9bf2c8ca063b75
(cherry picked from commit 078f38606df67faae630f41c4a9c67992e5c312c)
diff --git a/tests/TrustTests/TEST_MAPPING b/tests/TrustTests/TEST_MAPPING
new file mode 100644
index 0000000..b9c46bf
--- /dev/null
+++ b/tests/TrustTests/TEST_MAPPING
@@ -0,0 +1,15 @@
+{
+  "presubmit": [
+    {
+      "name": "TrustTests",
+      "options": [
+        {
+          "include-filter": "android.trust.test"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.FlakyTest"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file