Pull in new translations and regenerate the background strings for
recovery UI.
Bug:27837319
Bug:26548285
Change-Id: I274938a5039421b947878da82336443e9647df24
Add a image for "installing security update"; and make the text
looks larger in the image. Also extend the length of string
wrapper for high definition devices, so the text will fit better
on the screen.
Bug: 22465983
Bug: 27837319
Change-Id: I2a8b7437f96a834660d6d8d8861c722dcde812f2