Replace malloc/calloc/free with osi_malloc/osi_calloc/osi_free

There were several leftover places that were still using
malloc/calloc/free .
Those are replaced to use osi_malloc/osi_calloc/osi_free like
majority of the rest of the code.

Note: There are few remaining places that are still using
malloc/calloc/free:
 * Some of the unit tests
 * audio_a2dp_hw/audio_a2dp_hw.c
   It is used as part of the audio.a2dp.default.so library,
   and the bluetooth.default.so library
   Its usage of malloc/calloc/free should be refactored
   independently.

Change-Id: Iafbed996e5f1ae8eb1343fb2acfadf32e515e419