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
CM11 Themes: remove handleThemeConfigChanges

This was used by the T-Mobile theme chooser and is no longer
needed with the new chooser.

Change-Id: I035606ffe6cb3efc82a3a0ce79215509d8289503
WallpaperPicker: Destroy cropview to avoid leaks

If the cropview's TiledImageRenderer is rendering threads, the activity
context gets leaked. Avoid that by invoking its destroy in onDestroy() of activity.

Change-Id: I0804c903d14d3f3d13529f0fe90d12784d97e93f
CM11 Themes: Don't set sys.refresh_theme on icon update

Change-Id: I5ed49ad2aa93974c54434e092946c4be7699131d
CM11 Themes: Properly handle themeing apps on install

Previously when an app was installed or re-installed it would not
pick up the currently applied theme.

mOverlays was not being properly updated and therefore newly
installed or re-installed apps would not pick up the currently
applied theme.

Change-Id: I7ce5454af11fb44e9a73b30858d893050b2fba8a
CM11 Themes: Handle legacy themes in createIdmapsForPackageLI

Change-Id: Iff42bac7bf84b9c739831775c8deef86adbdc0ca
Add CPU boosting hooks

 * Send boost hint during scrolling
 * Still relevant on even high-end hardware

Change-Id: I72f2c2851b01fbceabddead03a4c3a7a0526ca61
CM11 Themes: Fix how common resources are found

During the boot process, application info may not be fully
available and createPackageContext can throw a null pointer which
causes a theme's resource-cache to be cleared.  If this theme is
in /system/app or /system/priv-app the theme will still be installed
but applying it will result in styles not being applied.

Change-Id: I4094bdd923edc1d829024404a4ce1b72709bd4f1
Send broadcast when package is 'about' to be removed

If a theme package is removed and it is the currently applied
theme, some apps will crash because the theme resources are
no longer available, since they were cleaned up by the package
manager.  The themes provider will receive this broadcast and
take care of switching back to the default theme for components
that are using the package about to be removed.

Change-Id: I968c25e19eb17ec87e7ddcba5ac0fd81745cef20