Fix expected failure in TextEdit hAlign_RightToLeft test.

Send events to the input item instead of the canvas.  And apply the fix
from 4.8 for the tested condition which somehow wasn't applied when the
test itself was.

Change-Id: I0f5bfe8fc13fc426b395fa8ef87cb5549789a92e
Reviewed-by: Martin Jones <martin.jones@nokia.com>