Revert "Quicksettings: USB Tether tile"

This reverts commit a843262b75491aaec84aedc0a00ee312cce3ac01.
QS: Update edit mode icon

Uses the correct transparency so that it matches the rest of the pulldown icons.

Change-Id: I783c4b4038b536dfb6d3c73fac3c739895e9cac6
Signed-off-by: Evan Anderson <evan1124@gmail.com>
TRDS: Dark DocumentsUI

for Downloads app

PS:
- fix settings

Change-Id: I87d49e97b8a0a67bd4d85f0137eb0960155428cb