Update action bar item widths, overflow menu, button, and spinner styles

Manually modifies the overflow button hotspot bounds so that the ripple
appears to be centered on the overflow icon. Adds styleable and parsing
for list popup window offsets. Updates spinner text appearance to be
consistent with drop down item text appearance. Also updates horizontal
inner padding in buttons.

BUG: 17305079
BUG: 17304391
BUG: 17302567
Change-Id: Iafddfef290078de968894a3b443ba9f60f84c6d4