Add system bar setting

Change-Id: I2aaacfae96ea197368057aa82129efd91577f186
Add descriptions used for USB storage

Change-Id: I9f007576b0e8948449c427489a1981067c529560
Add CPU frequency scaling settings

Change-Id: I294d736f3dacaa59581c5171496eb84ac3dfc562

Conflicts:
	AndroidManifest.xml
Apply system bar setting after it is changed

Change-Id: I62895e4c3e0180e370fe142f42f4fb8cbbda3824
Show system bar setting only if needed

Change-Id: I1f4eb9c6210b1279b2c282deea328f141f5a45e3
Move system bar setting to user interface settings

Change-Id: Ia226343f3e1345c6777214cb063079e1864dfebe
Add charging light setting

Change-Id: I1c49703dd06f45e6d2d7c15a3ebdc19b3a24fd98
Add moving navigation bar setting

Change-Id: I42641126f981472eeae9ba1df4ec0dd4c9f9446e