Fix pre processor interfaces implementation

- Fix SL_IIDs for AEC, NS and AGS interfaces to match actual
effect type GUIDs.
- Remove IsAvailable() method which did not work because the interface
could not be exposed anyway if the effect was not present
on the device. Also the implementation was linking directly against
the effect factory which is not allowed in non priviledged processes.
- Make pre processor interfaces EXPLICIT instead of OPTIONAL.
- Exit early in AudioRecorder realize if the native AudioRecord creation
fails.
- Add native AudioTrack cleanup in case of error in AudioPlayer realize().

Bug: 4999001

Change-Id: I6235248234491eaa9723cde9de85b965c031571d