Themes: Map themed icon to app after upgrade

Before this patch, applying an icon theme and then upgrading an app would
cause the app to lose its themed icon.

Change-Id: Ia76a33d0fb731720aa735e9dd9596bc5d2e75d9f
CM11 Themes: load wp from apk if uri is null

When setting a default theme on first start, the provider may
not have processed the theme and the uri for the wp will be null.
If this happens try to load the wallpaper from the themes assets.

Change-Id: I883b9dd796920e66e4729e78d41cd8899916fa42
Themes: Add read/write permissions [1/2]

Change-Id: Id9710a7f6058454f563488288220744b02cc4850

Conflicts:
	core/res/res/values/cm_strings.xml
CM11 Themes: Use package name from AndroidManifest

It is possible for an apk to have a different package
name for the resources than what is defined in the
AndroidManifest.xml of the apk.  Using the resource's
package name for the base package name causes themed
resources to not be properly loaded.

Instead of returning the resource package name we return
the apps package name from AssetManager.

A good example of this is Trebuchet.  The system sees
it as com.cyanogenmod.trebuchet but it's resources use
com.android.launcher3.

Change-Id: Id57e68b27b3c7509e3358a7fd12ae73a03dd6cdf
CM11 Themes: Add themeChange config change to manifest

Change-Id: Ia84c0089a79637906e4f75fa38a56e8ff3b21a2b