Merge LC3 fixes and improvements

This patch is a copy-paste of lastest LC3 encoder/decoder version.
Folowing patches were added:
Add downsampling / upsampling options for encoder / decoder
src: fix dereference of encoder before check of nullity
test: fix parenthisis typo
fix: Improper buffer initialization, when resampling disabled
fix: parameter of setup_encoder() sadly inverted

Bug: 150670922
Test: compile
Change-Id: If91239d18d7a6c05cc68b11dcebbfd063fe8da02