Revert "Fixup app-private dirs that are not writable."

This reverts commit 13f793aec9.

Reason for revert: Breaks device health checks; crashes if dir is null.

Bug: 181726193
Bug: 182088154

Fixes: 186633787
Change-Id: Ia28df79c6ff4aacd6bdadf1d9c540f49dcace707

core/java/android/app/ContextImpl.java

@@ -3273,13 +3273,6 @@ class ContextImpl extends Context {
                     dir = null;
                 }
             }
-            if (!dir.canWrite()) {
-                // Older versions of the MediaProvider mainline module had a rare early boot race
-                // condition where app-private dirs could be created with the wrong permissions;
-                // fix this up here. This check should be very fast, because dir.exists() above
-                // will already have loaded the dentry in the cache.
-                sm.fixupAppDir(dir);
-            }
             result[i] = dir;
         }
         return result;