Add a mechanism for broadcasts to control background dispatching.

Right now this is just for the BOOT_COMPLETED broadcast to allow
all apps to receive it.

Also clean up the dumpsys of the broadcast queue to not have
every little detail of ResolveInfo+ActivityInfo+ApplicationInfo,
which is just not useful and makes reading the broadcast queue
debug output a lot harder because of so much noise there is.

And rename the package shell query-intent-* commands to a
shorter query-* form.

Change-Id: I0d01565babb87e68b840c9756a2ea730d699efc7