Revert "Don't check allowBackup in PackageManager"

This reverts commit 0c098c47a5ec999bcdfe1659e1efa5bf927ce2ed.

Reason for revert: Broken test (b/166767190)

Change-Id: I5a9c7be8f317f07413c1197ac7dc7d762ee98eb4
1 file changed