Handle safe mode in PackageManager.

ART side of the change.

bug:37929796
Test: manual OTA with a safemode app.

(cherry picked from commit 741d426f2eda2ea1f1a8d7dfce1cd741a6737cc6)

Change-Id: Ibdcd10392697188eb9cc7e572fc6224722db2987
4 files changed