[2/2] Frameworks: HALO Forward port from jb.

Change-Id: Id1d6baa2ab95ecf405c02c5d82732d1f545fc10a
PS1: Initial port Fix conficts with notification LED Fix derp Major derp HALO Mods Rebase Fix blackist, code clean and added some TODOs
PS2: Fix build
PS3: Fix bubble sometimes doesn't respond on new notification
PS4: Align halo icon
PS5: Keep floating app in recents and disable transparent layer temporarily (NOT INCLUDED)
PS6: Fix conflict after recent merges
PS7: Cosmetic fixes: Fix buttons layout in status bar. Status bar button holders show halo + qs switch on notification and qs edit mode + notification switch on qs. Update new margins size. (PARTIALY INCLUDED)
PS8: Rebase Clean white spaces Toggle on/off from notification shade icon (remove red X) Standardize behavior (remove option to reverse tap/double tap)
PS9: Remove references to LayerActivity
PS14: Rebase
PS15: update halo strings to prevent conflict with latest changes
PS16: Wrap all things! Modify halo behavior
PS17: Get the correct activity stack: this makes all windows in the same stack to get the floating mode
PS18: Stop pop-out on rotation
      Catch "silent" notifications
PS19: Rebase
PS20: Rebase, fix conflicts with recent merges
PS21: Fix missing commit messages from previous undefined patchset (19) and other conflicts
Change-Id: I257b7109cc1efd146a1e7096143f45c4f9dc8f98