Bug 3261766
If defined, the drawable is used instead of directly drawing a 1 pixel
line. This makes the cursor more fancy and more visible.
The drawable is currently clipped by the TextView's limits, which is
currently visible on the left when the cursor is at the first position.
To solve this issue properly, we would need to propagate a do-not-clip
up in the hierarchy.
Change-Id: I99f6001048eed14104994acf6bab942dda8eb38e
f75c97e023