Settings: show force overflow if any bindable keys available

Change-Id: I8f15db14fe09a7ff00d7c3f6088bb53691c1aed5
Settings: Mock SMS (3/4)

This change brings the possibility of simulate the reception of SMS on real devices.
This change includes the settings to enable/disable the mock SMS feature.

Ported from http://review.cyanogenmod.org/#/c/23018

Patchset 2/3: Rebased

Change-Id: I8818995147c41db261d9c9506c1741ed99ef581e
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Settings: Display up caret for Status and ChooseAccountActivity

Change-Id: Ia9d51b53df8a3eb4c1b9dee1aeefb0b74eac0fde
Performance settings: remove dithering setting

This setting has no effect in CM10.2, as SurfaceFlinger has now been
taught to automatically Do The Right Thing [tm] with regards to deciding
when to enable surface dithering.

Change-Id: I67fba732440507c1209f2793d826badd4b4d34d5
Merge "Settings: show force overflow if any bindable keys available" into cm-10.2
Settings: ensure SystemSettingCheckBoxPreference defaultValue is set

Change-Id: If2a6234ad78e7b03de86f72e866633817cf888c5
Settings: Lock screen music controls should default to on

This matches AOSP

Change-Id: Ia2cfd5fd59eeea27374533cc3db5ee0c9bb00b44
Fix broken target icon.

Steps to reproduce:
- Assign an icon from file
- Save
- Reopen lockscreen targets
- Assign a resource icon
- Save

Result: You'll get the application icon, because the icon file reference
is still present, but the file is no longer there.

Change-Id: I8851f5fbdebfeeef9459c5b44c599e489b2dda3a
Merge "Fix broken target icon." into cm-10.2
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2

Conflicts:
	res/xml/performance_settings.xml
	src/com/android/settings/cyanogenmod/PerformanceSettings.java

Change-Id: I75d27a9a7bcee7b23d8cc137d89fc0f5ed6f4aaa