Second try at adding a compatibility symbol for the MemoryBase constructor.

Third-party libraries are currently trying to use the
MemoryBase constructor but failing because we fixed the
definition of ssize_t. This is a stop-gap for users of
this private API until we can get them fixed.

Bug: 8253769
Change-Id: Ie7c86f45fa39cb53539cab0ffe8585a585656714
[2/2] Speed up booting on multicore devices.

Add multithreading support.

Change-Id: I13630de9d75d13c0368d261b3564b787067b65b1
STE: multimedia fix

Conflicts:
	include/binder/Parcel.h
	libs/gui/GLConsumer.cpp
	libs/ui/PixelFormat.cpp