Settings: fixed battery stats app list

http://jira.omnirom.org/browse/OMNI-493

The check of mAppListGroup getPreferenceCount is no longer working
after we added other options on this page. Add a separate counter to get
back the full possible list of 12 apps

PS3:
IMHO the number of apps should be 10 if we have
MAX_ITEMS_TO_LIST = 10

Change-Id: I679b01deec0f52d4fa2012a31b7b305f8fe176b5
Fix one NPE in tethering setting

Once we not declare BT feature, go Setting->more->tethering
will trigger this NPE.
Cherry-picked from AOSP: https://android-review.googlesource.com/#/c/63695/

Change-Id: I4736e7bade261475acda74e26250a81452018ffa
Signed-off-by: Jianzheng Zhou <jianzheng.zhou@freescale.com>
Bleed keyguard widget picker list into translucent bars

Change-Id: Ie929845fd8b822dcf858b9b56cb5758379d55c59
Merge remote-tracking branch 'settings/kitkat-remix' into remix-legacy