iorap: AppLaunch - wait for background job to complete.

The background job will always compile all pending packages,
so trying to resume app launching too quickly after just 1 package
has been compiled will lead to undefined behavior.

Bug: 152322429
Test: am instrument
Change-Id: I97f773206196bf0ac469fbb87109fd5473b5ea07
Merged-In: I97f773206196bf0ac469fbb87109fd5473b5ea07