Promote system app permissions

When upgrading from a pre-M version of Android, install permissions for
exisiting system are promoted to runtime permissions. This only happens
for apps that existed prior to the OTA. Other system apps targeting M
are not automatically granted any permissions.

Bug: 22970710
Change-Id: I964ee3f93c66ea43fbb1be6b5ac6b09ddea3c385
1 file changed