Add new steps for trust anchors
- Add StepRegisterTrustAnchor step for install requests
- Add StepUnregisterTrustAnchor step for uninstall requests
- Add StepUpdateTrustAnchor step for 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-backend] : https://review.tizen.org/gerrit/136858
[wgt-manifest-handlers] : https://review.tizen.org/gerrit/136866
Change-Id: I1cdd078b4833174458ea08811dab0afee3556cfd
Signed-off-by: Junghyun Yeon <jungh.yeon@samsung.com>