Revert vector drawables for menu icons

Since they theoretically can be used by the
framework action mode, we should keep the icons as
bitmaps pre-L. We use the framework assets on
Lollipop and beyond anyway.

BUG: 28657836
Change-Id: Ia9aa00b98cef6dd5ff6c5d80c98c08773d7f6540
43 files changed