Make sure debuggerd_test is run on device.

Tests starting failing on aarch64, so force presubmit to run the
debuggerd tests on device to close this coverage hole.

Test: Treehugger and verify tests are run on device.
Change-Id: Ie40eab35e46cefd3cebc132d9c0a3d1ebdb0d766
diff --git a/debuggerd/TEST_MAPPING b/debuggerd/TEST_MAPPING
index 61d7155..824d20a 100644
--- a/debuggerd/TEST_MAPPING
+++ b/debuggerd/TEST_MAPPING
@@ -4,6 +4,10 @@
       "name": "debuggerd_test"
     },
     {
+      "name": "debuggerd_test",
+      "keywords": ["primary-device"]
+    },
+    {
       "name": "libtombstoned_client_rust_test"
     },
     {