Revert "Remove file-system-roots plugin as a dependency (it's a part of file now)"
Revert "Remove file-system-roots plugin as a dependency (it's a part of file now)"

This reverts commit 2fc95e3201e13c91f7cf601ccc79afc4d1069dd5.
We still use this, I'm just crazy.

feedhenry/cordova-app-harness,feedhenry/cordova-app-harness,guozanhua/chrome-app-developer-tool,apache/cordova-app-harness,apache/cordova-app-harness,guozanhua/chrome-app-developer-tool,apache/cordova-app-harness,feedhenry/cordova-app-harness,apache/cordova-app-harness,guozanhua/chrome-app-developer-tool,feedhenry/cordova-app-harness,guozanhua/chrome-app-developer-tool