The naming was ANIM_UP, ANIM_DOWN, but the animations were from right and
left. Since right and left are flipped for RTL, this CL renames them
with direction agnostic ANIM_ENTER and ANIM_LEAVE.
Change-Id: I8de1603b1baaef3d4ba8fbd593f5e53143698dff
Show directory animations coming in from left-side when in RTL
language. Also fix NinePatchDrawable to correctly mirror its padding
when auto-mirrored, and fix InsetDrawable to propagate the layout
direction to the wrapped Drawable.
Bug: 10987190, 11030793
Change-Id: I1213802a07d0c4ced93438df1e6ddf5aed3df677
