Fixes a few bugs on the keyguard with font density changes

The reinflation of the system icons was not working correctly
and all the paddings were of.
Also the affordance icons were outdated and had to be reloaded.

Change-Id: I3cf338d33a82c8be94d01561d7b7d9a37a563ad9
Fixes: 28968657
Fixes: 28672410