Add read permission to storage_area_keys to installd am: c1508ec794

Original change: https://android-review.googlesource.com/c/platform/system/sepolicy/+/3068060

Change-Id: Idc62086a03f1f3bec88f03bd0e1be00f01192d6f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>