Promote HWASan tests to presubmit.

They have been passing and do not show significant slowdown.

Change-Id: If3aea998fcf33559824cf02e9963e8a71ac80163
diff --git a/fs_mgr/liblp/TEST_MAPPING b/fs_mgr/liblp/TEST_MAPPING
index 875ccb0..cf0d22b 100644
--- a/fs_mgr/liblp/TEST_MAPPING
+++ b/fs_mgr/liblp/TEST_MAPPING
@@ -4,7 +4,7 @@
       "name": "liblp_test"
     }
   ],
-  "hwasan-postsubmit": [
+  "hwasan-presubmit": [
     {
       "name": "liblp_test"
     }