Move ComposHostTestCases to postsubmit, since it has a high failure rate on cf in presubmit.

Bug: 264496291
Change-Id: I70dfc635de37adc8f9107466e06a887da02f0797
diff --git a/TEST_MAPPING b/TEST_MAPPING
index d17b434..3217ee1 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -4,9 +4,6 @@
       "name": "MicrodroidHostTestCases"
     },
     {
-      "name": "ComposHostTestCases"
-    },
-    {
       "name": "MicrodroidTestApp"
     },
     {
@@ -36,6 +33,9 @@
       "name": "ComposBenchmarkApp"
     },
     {
+      "name": "ComposHostTestCases"
+    },
+    {
       "name": "AVFHostTestCases"
     }
   ],