[2/2] settings: volume Panel tweaks

Setting to disable volume adjust sounds (VOLUME_ADJUST_SOUNDS_ENABLED)
This is so annoying :)

Enhanced dialog to add checkbox for unlinking ringer and
notification volume (VOLUME_LINK_NOTIFICATION)

some minor code style issues fixed + always use onchange listener
onclick is depreciated even if google still uses it....but
we can go with actual API

Change-Id: Ia30bbb1c2f44d0c21cd08748bd552685810f960f
settings: add Slim's keyboard IME features (2/2)

this commit adds:

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

some fixes to the 4.2/4.3 implementations + added full multiuser
support for all this features

cheers

Change-Id: I58596f11ee09c6db77119f3e3044e1ec2dd30c0a