Should i be worried of these permissions from an app?
From what I have found, a Sticky Broadcast is a broadcast from an application that stays hanging around after it has been dealt with. It helps for things like battery level. I found this here.

As for Request Install Packages, it


  Allows an application to request installing packages


Source: Android Developers

As for why an app would need permissions to something that it seems like it has no business using, there could be a few explanations. I am a developer and can say that there might be something in the API for Camera that is used, but the actual camera is not. Without know what app you are wanting, one could not say definitively.