CM11 Themes: Common overlay for sharing resources. [1/2]

This patch will allow themes to contain common resources
which can be shared by all overlays.

Common resources will reside in assets/overlays/common and
can be referenced by other overlays.

Common resources will be referenced using the common package
name, i.e. To reference the common drawable some_drawable for
com.example.theme the theme designer would use
"@*common:drawable/some_drawable"

Change-Id: I395b6bd5eae91b00265a8e9221856ef7bf5d115a
CM11 Themes: Ensure customTheme is not null.

The configuration retrieved via getConfiguration() sometimes contains
a null customTheme which results in the theme returning to holo when
applying a component such as icons.  Icons will change but styles
and fonts would return to the default.

Change-Id: Iac0cb8eed5de8fdc9fe8efd697d968f26e801c08
CM11 Themes: Include alarms in mixnmatch.

Change-Id: I004f6b0149d71c8ed1a3952704f5a3521eca5add
CM11 Themes: Properly handle SystemUI theme package name.

Change-Id: Ia8915684e1620184dcc513c2c5039ea20aabbd04
Set themes to install internal only

Themes should not be moveable to sdcard. Before this patch the new
style themes installed with forward lock would fail.

Change-Id: Iea50f5526b1c2c56a825757eac5bf4bb01b4686d
wallpapercropper: OOM issue while opening *.bmp image

This change manages setting of large images as
wallpapers without encountering OOM.

CRs-fixed: 619815
Change-Id: I3a32ec4b42050b146076f0adf6b6e65afd6fae4e
Add wallpaper pickers to seperate package [1/2]

Currently wallpaper pickers were part of the various launchers
and we were relying on Trebuchet's to add code for including
wallpapers from themes.  If Trebuchet is removed then this
functionality is lost.  This package is already included in all
builds so making the picker available here removes the dependency
on a specific launcher.

Trebuchet still contains a picker which should probably be removed
and make use of this package instead.

Change-Id: Ie42ae0e01f951a8293d13d6c8a73fde0dea6682b
Style previews [1/3]

Change-Id: Ifed0ef7829eb61492a39395e8140b99f01c5e6a3