e2etests: enhance CF host presubmit to cover SDV and IVI use cases

- Add sdv_media to cvd_create_tests.
- Add SDVMedia and Auto (IVI) to launch_cvd_tests.
- Add multi-instance sdv_core + sdv_media test case to cvd_load_tests.

These tests use Tip of Tree (@ab/git_main) artifacts to ensure 3p
accessibility and alignment with standard presubmit patterns.

Bug: 507906785
Test: local bazel validation

Author: sferrogoo

e2etests/cvd/cvd_create_tests/main_test.go

@@ -38,6 +38,10 @@ func TestCvdCreate(t *testing.T) {
 			branch: "git_main-throttled-nightly",
 			target: "aosp_cf_x86_64_auto-trunk_staging-userdebug",
 		},
+		{
+			branch: "git_main",
+			target: "aosp_cf_x86_64_sdv_media-trunk_staging-userdebug",
+		},
 	}
 	c := e2etests.TestContext{}
 	for _, tc := range testcases {

e2etests/cvd/cvd_load_tests/main_test.go

@@ -133,6 +133,44 @@ func TestCvdLoad(t *testing.T) {
   "common": {
     "host_package": "@ab\/aosp-android-latest-release\/aosp_cf_x86_64_only_phone-userdebug"
   }
+}`,
+		},
+		{
+			name: "GitMainSDVMULTI",
+			loadconfig: `
+{
+  "instances": [
+    {
+      "name": "core",
+      "disk": {
+        "default_build": "@ab\/git_main\/aosp_cf_x86_64_sdv_core-trunk_staging-userdebug"
+      },
+      "vm": {
+        "cpus": 2,
+        "memory_mb": 4096
+      },
+      "graphics": {
+        "displays": [],
+        "record_screen": false
+      }
+    },
+    {
+      "name": "media",
+      "disk": {
+        "default_build": "@ab\/git_main\/aosp_cf_x86_64_sdv_media-trunk_staging-userdebug"
+      },
+      "vm": {
+        "cpus": 2,
+        "memory_mb": 4096
+      }
+    }
+  ],
+  "metrics": {
+    "enable": true
+  },
+  "common": {
+    "host_package": "@ab\/git_main\/aosp_cf_x86_64_only_phone-trunk_staging-userdebug"
+  }
 }`,
 		},
 	}

e2etests/cvd/launch_cvd_tests/main_test.go

@@ -31,6 +31,16 @@ func TestLaunchCvd(t *testing.T) {
 			branch: "git_main",
 			target: "aosp_cf_x86_64_only_phone-trunk_staging-userdebug",
 		},
+		{
+			name:   "GitMainSDVMedia",
+			branch: "git_main",
+			target: "aosp_cf_x86_64_sdv_media-trunk_staging-userdebug",
+		},
+		{
+			name:   "GitMainAuto",
+			branch: "git_main",
+			target: "aosp_cf_x86_64_auto-trunk_staging-userdebug",
+		},
 		{
 			name:   "AospMainPhone",
 			branch: "aosp-android-latest-release",