Fix of Settings application sort crash

The original implementation of compareTo function
will sometimes cause crash when the power usage list
above 32 items.

When comparing double values a proper comparison method
needs to be used. Using just subtraction does not take
into account NaN:S, infinities and +/-0 numbers. In certain
cirtumstances it seems that using subtraction causes
compareTo to return values that is not expected by the
sorting code and causes an illegal argument exception with
"Comparison method violates its general contract!".

This problem only happens if the sort code is called arrays
containing more than 32 (currently) due to how
ComparableTimSort works (call chain is Collections.sort ->
Arrays.sort(Object[]) -> ComparableTimSort.

Change-Id: If732f04797a3c8b2a43568c90bb73a1ec69a4c98
Add launcher configuration item - CM

    This was jumbled together with a ton of lockscreen stuff that needs
    to be fully remade, so I just give up on rebasing it in. Just
    add the feature.

    PS - #$%#@^% squashed commits for separate features...

    Change-Id: I4820edc7710206174b082ace542d76ec459559db

    Conflicts:
    	res/values/strings.xml
    	res/xml/settings_headers.xml
    	src/com/android/settings/Settings.java

Conflicts:
	res/values/strings.xml
	res/xml/settings_headers.xml
	src/com/android/settings/Settings.java