Fixed possible heap corruption in EffectDesc

"EffectDesc *effect = new EffectDesc(*effects[i]);" was relying on the
default copy constructor for EffectDesc, but the default copy constructor
does a member-by-member copy.  This works OK for mUuid, but a member
copy of mName and mParams shares pointers.  This could result in heap
corruption later on due to a double free.  Changed to add an explicit
copy constructor that does a deep copy of both mName and mParams.

A malloc() and strdup() were being freed by delete, but the correct
matching API for these is free().  Fortunately our current memory runtime
implementation ignores the difference. Changed to use free().

EffectDesc and InputSourceDesc member fields were being torn down by
the code that does delete.  Changed to do the tear-down in ~EffectDesc()
and ~InputSourceDesc().

Added constructor EffectDesc() with name and UUID parameters, rather
than having caller fill in the object after construction.

Made ~EffectDesc() and ~InputSourceDesc() non-virtual to save memory,
since they have no subclasses.

Change-Id: Ibb5cc2e6760d72e0c4cf537068ac4432c717bafd