Delete the checkin directory with the wrong context

http://aosp/1845900 creates the directory with the wrong permission
and context. And when we attempt to fix it in http://aosp/1860276, the
device would fail to boot if the device is already on the bad build.

As a temporarily fix, already delete that checkin directory in vold. And
we can revert the deletion when the droidfood daily polulation gets out
of the bad state.

Bug: 203742483
Test: Update from TP1A.211016.001 and make sure the boot doesn't fail
Change-Id: Iec74528c1fe0e5876acc601e5cd008f99852d269
diff --git a/vold_prepare_subdirs.cpp b/vold_prepare_subdirs.cpp
index 862191c..0d58e4d 100644
--- a/vold_prepare_subdirs.cpp
+++ b/vold_prepare_subdirs.cpp
@@ -215,7 +215,15 @@
             // the user id to set the correct selinux mls_level.
             if (!prepare_dir_for_user(sehandle, 0770, AID_SYSTEM, AID_CACHE,
                                       misc_ce_path + "/checkin", user_id)) {
-                return false;
+                // TODO(b/203742483) the checkin directory was created with the wrong permission &
+                // context. Delete the directory to get these devices out of the bad state. Revert
+                // the change once the droidfood population is on newer build.
+                LOG(INFO) << "Failed to prepare the checkin directory, deleting for recreation";
+                android::vold::DeleteDirContentsAndDir(misc_ce_path + "/checkin");
+                if (!prepare_dir_for_user(sehandle, 0770, AID_SYSTEM, AID_CACHE,
+                                          misc_ce_path + "/checkin", user_id)) {
+                    return false;
+                }
             }
 
             auto system_ce_path = android::vold::BuildDataSystemCePath(user_id);