base

PopupWindow: Use DISPLAY_CLIP_VERTICAL/HORIZONTAL.

When we want the WindowManager to clip our requested width/height
to the display frame, we need to pass DISPLAY_CLIP_VERTICAL/HORIZONTAL.
It seems this behavior was unintentionally applied without this flag
in previous releases.

Bug: 29602363
Change-Id: Ib98060e36efde0dbaabb59a758da5374035dbb62