Scalable Icons API: Changes

The following header file(s) have changed between 3.0 and 3.1

**Table 1:** akniconutils.h
Type	Class	Change
New public method	`AknIconUtils`	`static void ExcludeFromCache( CFbsBitmap* aBitmap );`
New public method	`AknIconUtils`	`static void DisableCompression( CFbsBitmap* aBitmap );`
New enum value		`TScaleMode::EAspectRatioPreservedSlice`

**Table 2:** akniconsrvclient.h
Type	Class	Change
New public method	`RAknIconSrvClient`	`TInt EnableCache(TBool aEnable);`