Download Manager Engine API: Changes

The following header file(s) have changed between 3.1 and 3.2

**Table 1:** downloadmgrclient.h
Type	Class	Change
New protected method	`RHttpDownloadMgr`	`RHttpDownload& AddToArrayL( RHttpDownload* aElement );`
New public method	`RHttpDownload`	`TBool IsClosed()`
New friend class	`RHttpDownload`	`friend class RHttpDownloadMgrApiExt;`

**Table 2:** httpdownloadmgrcommon.h
Type	Class	Change
New constant		`_LIT8( KDd2MimeType, "application/vnd.oma.dd2+xml" );`
New enum value		`THttpDownloadState::EHttpDlNonPausableNetworkLoss`
New enum value		`THttpProgressState::EHttpProgCodPdAvailable`
New enum value		`THttpProgressState::EHttpProgContentFileMovedAndDestFNChanged`
New enum value		`THttpDownloadAttrib::EDlAttrDownloadUpdatedDDUri`
New enum value		`THttpDownloadAttrib::EDlAttrCodPdAvailable`
New enum value		`THttpDownloadAttrib::EDlAttrLocalFileName`
New enum value		`THttpDownloadMgrAction::EPdLaunch`

**Table 3:** downloadmgrclientapiext.h
Type	Class	Change
New class	`RHttpDownloadMgrApiExt`