Base: Mirroring layout on RTL languages [1/2]

When Force RTL layout (in developer options) is sellected on RTL language (Arabic, Hebrew, etc) - mirror back to LTR.
There is another commit (same name but with [2/2]) which just changes the strings to match the new meaning for RTL languages.

Change-Id: I94afc12964fa1d57914420fb253521dda8f1516e