Fix SnapshotTest crash

For Android 12 vendor project, SnapshotTestEnvironment setup is skipped. So, test_device is not initialized, which will cause other tests to fail.

BUG:350678717
Test:run vts -m vts_libsnapshot_test
(cherry picked from https://android-review.googlesource.com/q/commit:a791e913048801a2a74beaea42b992c380eb8c2c)
Merged-In: I6ce6a9e7ea2c210e25c2a5ffadaaa6348086ea7f
Change-Id: I6ce6a9e7ea2c210e25c2a5ffadaaa6348086ea7f
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 07f1301..bf16b0f 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -2837,7 +2837,6 @@
     // that is fixed, don't call GTEST_SKIP here, but instead call GTEST_SKIP in individual test
     // suites.
     RETURN_IF_NON_VIRTUAL_AB_MSG("Virtual A/B is not enabled, skipping global setup.\n");
-    RETURN_IF_VENDOR_ON_ANDROID_S_MSG("Test not enabled for Vendor on Android S.\n");
 
     std::vector<std::string> paths = {
             // clang-format off