Add RavenwoodBivalentTest to ravenwood-presubmit.

There are already many TEST_MAPPING files added which will be active. https://cs.android.com/search?q=%22ravenwood-presubmit%22%20filepath:test_mapping&sq= This change adds more trigger paths for RavenwoodBivalentTest, and removes the unused "postsubmit-ravenwood" suite.

Bug: 350545439
Change-Id: I6bd54b26272eb7b751b2ba909d3f62e8e6512211
Flag: EXEMPT refactor
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 49384cd..5db0772 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -137,13 +137,14 @@
       "name": "CtsStrictJavaPackagesTestCases"
     }
   ],
-  "postsubmit-ravenwood": [
+  "ravenwood-presubmit": [
     {
       "name": "CtsUtilTestCasesRavenwood",
-      "host": true,
-      "file_patterns": [
-        "[Rr]avenwood"
-      ]
+      "host": true
+    },
+    {
+      "name": "RavenwoodBivalentTest",
+      "host": true
     }
   ],
   "postsubmit-managedprofile-stress": [