Account for text alignment in Op bounds calculation

bug:8243821

Previously this wasn't done for deferred clipping + reordering, so
non-left-aligned text would be clipped at defer time, when it wouldn't
have been at draw time (in OpenGLRenderer::quickReject())

Change-Id: Ic96949c2dca4378f284606b37d9411ed42f8d203
1 file changed