Frameworks: add all slim shortcut image resources

Importing for now the old one from KitKat. Graphics group is currently
vectorizing and revamping all. When they are finished we overwrite them and
add xxxhdpi ones as well.

Doing this now due that it is stopping the progress on a bunch of features right now

And a small method renaming to be inline with the other methods

Change-Id: If07e2ae19a45712cd537389069d912cf425e9156
Merge "Frameworks: add all slim shortcut image resources" into lollipop