Fix layout rendering for RTL locales

This changeset adds the framework resources for RTL locales and mirrors
the layout if the application is RTL aware.

Use ICU to check the character orientation of the locale - right to left
or left to right. Set the layout direction on the top level layout
accordingly. Also, load the RTL resources for Nav Bar when the locale is
RTL.

Change-Id: I1ed0d516ab64120a0abca413ba678036661508f8