Disable CtsStagedInstallHostTestCases from TM postsubmit group

Bug: 157377638
Test: none

Exempt-From-Owner-Approval: fix broken lab test

Change-Id: Ib5ba118821d72d4e48abf5a2fe9383a261fc4b1f
diff --git a/hostsidetests/stagedinstall/TEST_MAPPING b/hostsidetests/stagedinstall/TEST_MAPPING
index 8a1c753..0d57bfa 100644
--- a/hostsidetests/stagedinstall/TEST_MAPPING
+++ b/hostsidetests/stagedinstall/TEST_MAPPING
@@ -10,8 +10,9 @@
     }
   ],
   "postsubmit": [
-    {
-      "name": "CtsStagedInstallHostTestCases"
-    }
+    // TODO(b/157377638): Re-enable the test after the bug is fixed.
+    // {
+    //   "name": "CtsStagedInstallHostTestCases"
+    // }
   ]
 }