Settings: Completely remove "note" preference

Unused

Change-Id: I72f4a9022796c8dcdb0a9b04863723e5bdff89e5
Add an option/category in Dev Set to customize the device hostname (2/2).

PS2:
- cleanup

Change-Id: Iee14e90fa6fb6a13a123d92b7cf6dceaf6d18ffc

Conflicts:

	res/values/mahdi_strings.xml
Settings: add back all keyboard IME features back (2/2)

this commit adds:

- ime switcher notification - thanks cm
- fullscreen disable on landscape - thanks slim
- force autorotation on IME - thanks slim
- volume button control for navigate in the message - thanks cm
- force to show always enter key - thanks slim