Delete stale Virtualization image files

Delete all files and directories under
/data/misc/virtualizationservice at boot. Originally they were owned
by the virtualizationservice user; we now run as system, and don't
have permission to remove them after boot.

Bug: 230056726
Test: Create fake stale dir+file, see them deleted
Change-Id: I5ff7d055aeeb25ba7693e50876d6b8a830c4bf51
(cherry picked from commit 34ee0c931cd3e738271407cf5038f8145d9d415d)
diff --git a/rootdir/init.rc b/rootdir/init.rc
index aae28dc..15b6c4d 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -828,11 +828,11 @@
     # directory used for odsign metrics
     mkdir /data/misc/odsign/metrics 0770 root system
 
-    # Directory for VirtualizationService temporary image files. Always create
-    # a fresh new empty directory to remove any stale files from the previous
-    # boot.
-    rmdir /data/misc/virtualizationservice
-    mkdir /data/misc/virtualizationservice 0700 system system
+    # Directory for VirtualizationService temporary image files.
+    # Delete any stale files owned by the old virtualizationservice uid (b/230056726).
+    chmod 0770 /data/misc/virtualizationservice
+    exec - virtualizationservice system -- /bin/rm -rf /data/misc/virtualizationservice
+    mkdir /data/misc/virtualizationservice 0770 system system
 
     mkdir /data/preloads 0775 system system encryption=None