Add new steps for trust anchor
- Add StepRegisterTrustAnchor to install requests
- Add StepUnregisterTrustAnchor to uninstall requests
- Add StepUpdateTrustAnchor to update requests
Related changes:
[tpk-manifest-handlers] : https://review.tizen.org/gerrit/136315
[app-installers] : https://review.tizen.org/gerrit/136316
[pkgmgr-info] : https://review.tizen.org/gerrit/136317
[wgt-manifest-handlers] : https://review.tizen.org/gerrit/136866
[tpk-backend] : https://review.tizen.org/gerrit/137370
Change-Id: I3ff3dd724d444a7036746377b7c43da2788df2ac
Signed-off-by: Junghyun Yeon <jungh.yeon@samsung.com>