Decrease PackageManagerService wait time for vold

Up the blocking queue maximum to twice the number of containers we
allow which should let "asec list" complete without blocking the thread
several times.

Change the threads for the NativeDaemonConnector to vold and netd to be
more descriptive instead of the same name.

Bug: 2501075
Change-Id: I7e7949845a6c70a3d619aec0fa79ceef3c17a4be