Toast Animation [1/2]

PS5: Disable toast example for now. Creates an NPE.
PS6: Removed need for member var mContext -- fixes the NPE noted above.
PS7: Code re-formatting to match listview animation and interpolator
PS8: Included the fixes commit in this one
PS9: Fix the summary

Change-Id: I81adea54daa0bc888c7e0b0bd55f80cd4fb685a7