Add dropbox entries as files to dumpstate ZIP.

Since each dropbox entry is already stored as a file on disk, include
them as-is into the dumpstate ZIP file.

The dumpsys output has already included truncated versions of all
dropbox entries for many years, and adding them as separate files
inside the dumpstate ZIP will speed up debugging and issue triage.

Bug: 267673062
Test: manual
Change-Id: I6e83dd01221f43bb2e2efc1a12368db30a545c71
diff --git a/private/dumpstate.te b/private/dumpstate.te
index fe442b3..850b0d8 100644
--- a/private/dumpstate.te
+++ b/private/dumpstate.te
@@ -27,6 +27,12 @@
   allow dumpstate wm_trace_data_file:file r_file_perms;
 ')
 
+# /data/system/dropbox for dropbox entries
+userdebug_or_eng(`
+  allow dumpstate dropbox_data_file:dir r_dir_perms;
+  allow dumpstate dropbox_data_file:file r_file_perms;
+')
+
 # Allow dumpstate to make binder calls to incidentd
 binder_call(dumpstate, incidentd)