Add touch feedback to the clear all recents button

5 minutes of Photoshop™.

Change-Id: Idf8c97cf08a192605208cbee6f2ae41e0798e8d1
SystemUI: apply alpha value to all layouts.

Change-Id: I27d5a69eac50053ca34679bf7f6aed821245e132
screenshot: quick delete action

Add option to delete screenshot from notification

Change-Id: I0f153bc3c72b902163b4ae75e220ddb09e3fcb11