Added framework usb tests to postsubmit.

Test: atest UsbTests
Bug: 304579252
Change-Id: Ida9fc8011d21613ce8932542c6f522481a16dc13
diff --git a/tests/UsbTests/TEST_MAPPING b/tests/UsbTests/TEST_MAPPING
new file mode 100644
index 0000000..70134b8
--- /dev/null
+++ b/tests/UsbTests/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "postsubmit": [
+    {
+      "name": "UsbTests"
+    }
+  ]
+}
\ No newline at end of file