Fix issue #593153: Broadcast time out when sending...

...ordered broadcast for ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE

Turns out this was because the broadcast receiver for ContextImpl was
not correctly being created, so when it received an ordered broadcast
it would not tell the activity manager when it was done.

This is now fixed, along with a ton of superficial changes to debug
output to help track this down and a little cleanup of dealing with
error cases in dispatching broadcasts.  Also a fix for a NPE when
dumping the broadcast state.

Finally, a little fiddling with package manager to get rid of a lot
of the noise when removing and re-adding packages on the SD card.

Change-Id: I961c14836dc613d3ea8122b6e910ef866e7fcb25