Android 7.1.2 release 38
Rework thumbnail cleanup

Bug: 63766886
Test: ran CTS tests
Change-Id: I1173f67d6fb41494d6d069cc7cfc0c2b0dcc1725
Merged-In: I1173f67d6fb41494d6d069cc7cfc0c2b0dcc1725
(cherry picked from commit f6b8f04d495b9dd5f4fc84db3313624ef5fc66d2)
1 file changed