CM11 Themes: Don't set sys.refresh_theme on icon update

Change-Id: I5ed49ad2aa93974c54434e092946c4be7699131d
CM11 Themes: Properly handle themeing apps on install

Previously when an app was installed or re-installed it would not
pick up the currently applied theme.

mOverlays was not being properly updated and therefore newly
installed or re-installed apps would not pick up the currently
applied theme.

Change-Id: I7ce5454af11fb44e9a73b30858d893050b2fba8a
CM11 Themes: Handle legacy themes in createIdmapsForPackageLI

Change-Id: Iff42bac7bf84b9c739831775c8deef86adbdc0ca