sepolicy: Allow postinstall_dexopt /vendor/app access

Follow-up to commit 1b5f81a2d2fd0a09de75b416c3e995c4b9728192.

Bug: 36681210
Bug: 37158297
Test: lunch sailfish-userdebug && m
Test: Manually run OTA
Change-Id: Ifb4808c9255842a51a660c07ffd924cef52024c5
(cherry picked from commit e843044cc1837e12060cf120edb265b2fc874ab3)
2 files changed